Technical SEO Issues Checklist: 390+ Problems and Quick Fixes
Technical SEO forms the foundation of your website’s search engine performance. While content and backlinks get most of the attention, technical issues can silently sabotage your rankings. At Salam Experts, we’ve audited thousands of websites and identified every technical SEO problem that can hold sites back.
This ultimate guide covers 390+ technical SEO issues organized by category with numbered entries for easy reference and tracking. Use this as your complete technical SEO audit checklist.
Category 1: HTTP Status Code & Server Response Issues (1-25)
1. 404 Page Not Found Errors
Problem: Broken pages create dead ends for users and crawlers, wasting crawl budget.
Fix: Redirect to relevant content with 301s, update internal links, create helpful custom 404 pages.
2. 4XX Client Errors (401, 403, 410, etc.)
Problem: Various client errors prevent access to pages.
Fix: Identify error types, fix permission issues, redirect permanently deleted content (410).
3. 500 Internal Server Errors
Problem: Server can’t fulfill requests, blocking crawlers completely.
Fix: Check server logs, fix code errors, upgrade server resources if needed.
4. 5XX Server Errors (502, 503, 504, etc.)
Problem: Different server errors indicate various infrastructure problems.
Fix: Monitor uptime, fix gateway issues, optimize server response time, check PHP/database errors.
5. Timed Out Pages
Problem: Pages that don’t load within timeout period waste crawl budget.
Fix: Optimize server response time, reduce page size, fix slow database queries.
6. Slow Server Response Time (TTFB)
Problem: High Time To First Byte delays initial page rendering.
Fix: Use faster hosting, implement server-side caching, optimize database queries, use CDN.
7. DNS Resolution Issues
Problem: Domain name can’t resolve to IP address, making site inaccessible.
Fix: Check DNS settings, use reliable DNS provider, monitor DNS propagation.
8. Crawl Timeout Errors
Problem: Search engine bots timeout before completing page crawl.
Fix: Reduce page size, optimize server performance, simplify page structure.
9. Connection Refused Errors
Problem: Server actively refuses connection attempts.
Fix: Check firewall rules, review server security settings, ensure port 80/443 are open.
10. Too Many Connection Attempts
Problem: Server rejects requests due to rate limiting.
Fix: Adjust crawl rate in Google Search Console, optimize server capacity.
11. Incomplete Server Response
Problem: Server sends partial response, corrupting page content.
Fix: Check server logs, fix code issues causing incomplete output, optimize server resources.
12. Invalid HTTP Response Headers
Problem: Malformed headers confuse browsers and crawlers.
Fix: Validate header syntax, remove duplicate headers, fix character encoding issues.
13. Server Configuration Errors
Problem: Misconfigured server settings prevent proper site functionality.
Fix: Review .htaccess or server config files, test after changes, use correct rewrite rules.
14. Database Connection Errors
Problem: Website can’t connect to database, preventing dynamic content loading.
Fix: Check database credentials, optimize connection pooling, monitor database performance.
15. PHP Memory Limit Errors
Problem: Insufficient memory allocation causes scripts to fail.
Fix: Increase PHP memory limit, optimize code efficiency, reduce memory-intensive operations.
16. Gateway Timeout (504 Errors)
Problem: Proxy or gateway server timeout waiting for upstream server.
Fix: Optimize backend processing, increase gateway timeout settings, use faster hosting.
17. Service Unavailable (503 Errors)
Problem: Server temporarily unable to handle requests.
Fix: Check for maintenance mode, optimize server capacity, investigate resource overload.
18. Bad Gateway (502 Errors)
Problem: Invalid response from upstream server.
Fix: Check server communication, fix proxy configuration, restart problematic services.
19. Method Not Allowed (405 Errors)
Problem: HTTP method not supported for requested resource.
Fix: Enable required methods, check server configuration, review API endpoints.
20. Request Timeout (408 Errors)
Problem: Client didn’t send complete request within server’s timeout period.
Fix: Optimize client-side requests, increase server timeout where appropriate.
21. Pages Returning Wrong Status Codes
Problem: Soft 404s return 200 status for missing content.
Fix: Configure server to return proper 404/410 status codes, fix error page configuration.
22. Server Header Errors
Problem: Incorrect or missing server headers affect functionality.
Fix: Configure proper headers (Content-Type, Cache-Control, etc.), validate header values.
23. Charset Declaration Errors
Problem: Missing or incorrect character encoding causes display issues.
Fix: Declare UTF-8 in both HTTP headers and HTML meta tags.
24. CORS Errors
Problem: Cross-Origin Resource Sharing issues block resources.
Fix: Configure proper CORS headers, allow necessary origins, fix preflight requests.
25. SSL/TLS Handshake Failures
Problem: Failed secure connection prevents HTTPS access.
Fix: Update SSL certificates, fix cipher suite compatibility, check protocol versions.
Category 2: Redirect Issues (26-45)
26. Redirect Chains
Problem: Multiple redirects in sequence (A→B→C) slow page loading.
Fix: Point redirects directly to final destination, eliminate intermediate steps.
27. Redirect Loops
Problem: Circular redirects prevent pages from loading.
Fix: Audit redirect rules, remove conflicting redirects, test thoroughly.
28. Broken Redirects
Problem: Redirects point to non-existent pages.
Fix: Update redirect targets, remove obsolete redirects, test all redirect rules.
29. Temporary Redirects (302) Instead of Permanent (301)
Problem: 302 redirects don’t pass full link equity.
Fix: Use 301 for permanent moves, 302 only for temporary situations.
30. Redirect to Wrong Protocol (HTTP to HTTPS issues)
Problem: Redirects point to wrong protocol version.
Fix: Implement proper HTTPS redirects, update internal links, use HSTS.
31. Meta Refresh Redirects
Problem: Client-side redirects are slower and not preferred by search engines.
Fix: Replace with server-side 301 redirects, remove meta refresh tags.
32. JavaScript Redirects
Problem: JS redirects may not be followed by all crawlers.
Fix: Implement server-side redirects, use for user experience only.
33. Too Many Redirects Error
Problem: Browser gives up after too many redirect hops.
Fix: Limit redirect chains to maximum 2 hops, ideally direct to final URL.
34. Redirect Target Changed
Problem: Redirect destination keeps changing, confusing search engines.
Fix: Establish permanent redirect targets, avoid frequent changes.
35. 3XX Redirects in Sitemap
Problem: Sitemap contains redirecting URLs instead of final destinations.
Fix: Update sitemap with canonical URLs, remove redirected pages.
36. Redirect Destination Returns Error
Problem: Redirect points to 404 or 5XX page.
Fix: Update redirect targets to working pages, test all redirects.
37. Canonical URL Redirects
Problem: Canonical URL itself redirects elsewhere.
Fix: Set canonical to final destination URL, avoid redirecting canonicals.
38. Cross-Domain Redirect Issues
Problem: Redirects between domains lose link equity or fail.
Fix: Use proper cross-domain redirects, maintain redirect for extended period.
39. WWW to Non-WWW Redirect Issues (or vice versa)
Problem: Inconsistent domain version redirects cause duplicate content.
Fix: Choose preferred version, redirect consistently, update canonical tags.
40. Trailing Slash Redirect Inconsistencies
Problem: URLs with/without trailing slashes redirect inconsistently.
Fix: Establish consistent policy, implement across entire site.
41. Redirect to Lowercase/Uppercase URL Issues
Problem: Case-sensitive redirects create duplicate content.
Fix: Standardize URL case (usually lowercase), redirect consistently.
42. Mobile Redirect Errors
Problem: Desktop/mobile redirect issues cause accessibility problems.
Fix: Use responsive design instead, or implement proper mobile redirects with Vary header.
43. Geolocation Redirect Problems
Problem: Location-based redirects block search engines or wrong users.
Fix: Allow crawler access to all versions, use hreflang properly.
44. Redirect Lost During Migration
Problem: Old redirects removed during site migration.
Fix: Maintain redirect mapping file, implement all legacy redirects.
45. PDF/Download Redirects
Problem: Documents redirect unnecessarily.
Fix: Serve files directly when possible, use redirects only when needed.
Category 3: Indexability & Crawling Issues (46-75)
46. Noindex Tag on Important Pages
Problem: Pages marked noindex can’t rank in search results.
Fix: Remove noindex from pages you want indexed, audit all meta robots tags.
47. Noindex in Both Meta Tag and HTTP Header
Problem: Duplicate noindex directives are redundant.
Fix: Use one method consistently, remove redundant directives.
48. Noindex Page Receiving Organic Traffic
Problem: Valuable traffic going to non-indexable pages.
Fix: Remove noindex if page should rank, or redirect traffic to indexable alternative.
49. Noindex and Nofollow Combined
Problem: Double restriction prevents crawling and indexing.
Fix: Use only as needed for sensitive content, review necessity.
50. Indexable Page Became Non-Indexable
Problem: Previously indexed page now blocked from indexing.
Fix: Investigate reason for change, remove noindex if unintentional.
51. Noindex Page Became Indexable
Problem: Protected content now exposed to search engines.
Fix: Verify change is intentional, re-add noindex if needed.
52. Robots.txt Blocking Important Pages
Problem: Overly restrictive robots.txt prevents crawling critical content.
Fix: Review disallow rules, allow important pages, test with robots.txt tester.
53. Robots.txt Blocking CSS/JavaScript
Problem: Blocked resources prevent proper page rendering for crawlers.
Fix: Allow Googlebot to access CSS/JS files, update robots.txt.
54. Robots.txt Blocking Images
Problem: Images can’t be indexed in Google Images.
Fix: Allow image crawling unless specifically needed to block.
55. Robots.txt Syntax Errors
Problem: Malformed robots.txt ignored or misinterpreted.
Fix: Validate syntax, test thoroughly, fix formatting issues.
56. Robots.txt Not Accessible
Problem: Missing or blocked robots.txt causes crawl issues.
Fix: Create robots.txt in root directory, ensure server can serve it.
57. Multiple Robots.txt Files
Problem: Only one robots.txt per domain is recognized.
Fix: Consolidate into single robots.txt in root directory.
58. Robots.txt Changed Without Testing
Problem: New rules inadvertently block important content.
Fix: Test changes in GSC before deploying, maintain backup.
59. X-Robots-Tag HTTP Header Issues
Problem: HTTP header blocking indexing of resources.
Fix: Review server configuration, remove unnecessary X-Robots-Tag headers.
60. Nofollow in HTML and HTTP Header
Problem: Redundant nofollow directives.
Fix: Use one method consistently, remove duplicates.
61. Crawl Budget Wasted on Low-Value Pages
Problem: Bots waste time on unimportant pages.
Fix: Block low-value pages (tags, parameters), prioritize important content.
62. Excessive Crawl Rate
Problem: Aggressive crawling overloads server.
Fix: Adjust crawl rate in GSC, optimize server to handle normal crawling.
63. Insufficient Crawl Rate
Problem: Important pages not crawled frequently enough.
Fix: Improve site speed, reduce crawl errors, increase internal linking.
64. Crawl Anomalies
Problem: Unusual crawl patterns indicate problems.
Fix: Investigate GSC alerts, check for security issues, review server logs.
65. Pages Not Crawled
Problem: Important pages never visited by search bots.
Fix: Add internal links, include in sitemap, improve site architecture.
66. Crawled but Not Indexed
Problem: Pages crawled but excluded from index.
Fix: Improve content quality, fix technical issues, ensure proper indexing signals.
67. Discovered but Not Crawled
Problem: URLs found but not yet crawled.
Fix: Be patient for new content, improve internal linking, submit via GSC.
68. Blocked by Robots.txt but Indexed Anyway
Problem: URL in index despite robots.txt block (no description shown).
Fix: Remove robots.txt block and use noindex instead, or keep as is.
69. Alternate Page with Proper Canonical
Problem: Non-canonical version showing in index.
Fix: Strengthen canonical signals, add internal links to canonical version.
70. Duplicate Content Without Canonical
Problem: Multiple URLs with same content, no canonical specified.
Fix: Implement canonical tags, use consistent URL structure.
71. Soft 404 Errors
Problem: Missing pages return 200 status instead of 404.
Fix: Configure proper 404 responses, fix server error handling.
72. Faceted Navigation Indexation Issues
Problem: Filter pages creating duplicate content.
Fix: Use noindex on filter combinations, implement proper canonicals, use robots.txt.
73. Pagination Indexation Problems
Problem: Paginated series not properly handled.
Fix: Use rel=next/prev or canonical to view-all, optimize pagination.
74. Parameter Handling Issues
Problem: URL parameters creating duplicate content.
Fix: Configure parameter handling in GSC, use canonical tags, block in robots.txt.
75. Session ID in URLs
Problem: Session parameters creating infinite unique URLs.
Fix: Use cookies instead of URL parameters, implement canonical tags.
Category 4: Canonical Tag Issues (76-90)
76. Canonical Points to 4XX Page
Problem: Canonical URL is broken or inaccessible.
Fix: Update canonical to working page, fix or redirect canonical URL.
77. Canonical Points to 5XX Page
Problem: Canonical URL has server errors.
Fix: Fix server issues on canonical page, temporarily remove canonical.
78. Canonical Points to Redirect
Problem: Canonical URL itself redirects elsewhere.
Fix: Set canonical to final destination, avoid redirect chains.
79. Non-Canonical Page Specified as Canonical
Problem: Page’s canonical points to itself but it’s not the preferred version.
Fix: Point canonical to actual preferred version.
80. Canonical from HTTP to HTTPS
Problem: HTTP page canonicalizes to HTTPS version.
Fix: Implement proper HTTPS redirects, update all canonicals.
81. Canonical from HTTPS to HTTP
Problem: Secure page canonicalizes to insecure version.
Fix: Fix canonical direction, ensure HTTPS is preferred version.
82. Canonical URL Changed
Problem: Frequent canonical changes confuse search engines.
Fix: Establish permanent canonical strategy, avoid changes.
83. Missing Canonical Tags
Problem: No canonical specified, increasing duplicate content risk.
Fix: Add self-referencing canonicals to all pages.
84. Multiple Canonical Tags
Problem: Multiple canonical declarations on same page.
Fix: Keep only one canonical tag, remove duplicates.
85. Canonical in HTTP Header vs Meta Tag Conflict
Problem: Different canonicals in header and HTML.
Fix: Use one method consistently, ensure both match if using both.
86. Relative vs Absolute Canonical URLs
Problem: Relative canonical URLs can cause errors.
Fix: Always use absolute URLs in canonical tags.
87. Canonical to Different Language Version
Problem: Canonical points to different language, confusing search engines.
Fix: Use hreflang instead, canonical should match language version.
88. Canonical Chain (A→B→C)
Problem: Canonical points to page that canonicalizes elsewhere.
Fix: Point directly to final canonical destination.
89. Canonical to Paginated Page
Problem: Canonical points to page 2, 3, etc. instead of page 1.
Fix: Generally canonical to page 1 or view-all page.
90. Cross-Domain Canonical Issues
Problem: Canonical points to different domain.
Fix: Only use for legitimate syndicated content, verify ownership of both domains.
Category 5: Internal Linking Issues (91-110)
91. Orphan Pages (No Incoming Internal Links)
Problem: Pages unreachable through site navigation.
Fix: Add internal links from relevant pages, improve site architecture.
92. Canonical URL Has No Incoming Internal Links
Problem: Preferred version not linked internally.
Fix: Update internal links to point to canonical version.
93. Nofollow on Internal Links
Problem: Nofollow prevents PageRank flow through site.
Fix: Remove nofollow from internal links, let equity flow naturally.
94. Page Has Nofollow Incoming Internal Links Only
Problem: All internal links to page are nofollowed.
Fix: Change at least some to dofollow links.
95. Page Has Only One Incoming Internal Link
Problem: Page has weak internal link profile.
Fix: Add more contextual internal links from relevant pages.
96. Broken Internal Links
Problem: Internal links pointing to 404 pages.
Fix: Update or remove broken links, fix URLs, implement redirects.
97. Page Has Links to Broken Pages
Problem: Page contains outbound links to non-existent content.
Fix: Remove or update broken links, implement redirects for moved content.
98. Page Has No Outgoing Links
Problem: Page is a dead end with no navigation.
Fix: Add contextual links to related content, include navigation.
99. Too Many On-Page Links
Problem: Excessive links dilute link value and overwhelm users.
Fix: Reduce to essential links only, use pagination or categories.
100. Internal Links to Redirected Pages
Problem: Links point to redirecting URLs instead of final destination.
Fix: Update links to point directly to final URL.
101. Internal Links to Non-Canonical Pages
Problem: Internal links point to duplicate versions instead of canonical.
Fix: Update all internal links to canonical versions.
102. HTTPS Page Links to HTTP
Problem: Secure page contains links to insecure pages.
Fix: Update all internal links to HTTPS versions.
103. HTTP Page Links to HTTPS
Problem: Mixed linking between protocol versions.
Fix: Standardize on HTTPS, update all links consistently.
104. Deep Link Ratio Problems
Problem: Too many links to homepage vs. deep pages.
Fix: Balance internal linking, link to deeper content pages.
105. Nofollow and Dofollow Links to Same Page
Problem: Inconsistent internal linking signals.
Fix: Standardize link attributes, use dofollow for internal links.
106. Redirected Page Has Incoming Internal Links
Problem: Links point to redirecting URLs.
Fix: Update links to final destination.
107. Excessive Footer/Sidebar Links
Problem: Too many sitewide links dilute value.
Fix: Limit footer/sidebar links to essentials.
108. No Anchor Text in Links
Problem: Links with empty anchor text lack context.
Fix: Add descriptive anchor text to all links.
109. Non-Descriptive Anchor Text (“Click Here”)
Problem: Generic anchor text provides no SEO value.
Fix: Use descriptive, keyword-relevant anchor text.
110. Over-Optimized Anchor Text
Problem: Exact match anchor text looks manipulative.
Fix: Vary anchor text naturally, use branded and generic terms.
Category 6: URL Structure Issues (111-125)
111. URLs Longer Than 200 Characters
Problem: Excessively long URLs are hard to share and may be truncated.
Fix: Shorten URLs, remove unnecessary words, simplify structure.
112. Underscores in URLs Instead of Hyphens
Problem: Search engines don’t treat underscores as word separators.
Fix: Use hyphens (-) instead of underscores (_), redirect old URLs.
113. URLs with Multiple Parameters
Problem: Complex URLs with many parameters create duplicate content.
Fix: Reduce parameters, use URL rewriting, implement canonical tags.
114. Uppercase Letters in URLs
Problem: URLs may be case-sensitive, causing duplicates.
Fix: Standardize on lowercase, implement redirects for uppercase versions.
115. Special Characters in URLs
Problem: Non-standard characters can cause encoding issues.
Fix: Use only alphanumeric characters and hyphens, properly encode when necessary.
116. Non-ASCII Characters in URLs
Problem: International characters may not be supported everywhere.
Fix: Use URL encoding (punycode for domains), or use English equivalents.
117. Double Slashes in URLs
Problem: URLs with // can create duplicate content issues.
Fix: Fix URL generation logic, redirect double slash URLs.
118. Trailing Slash Inconsistency
Problem: Same URL with/without trailing slash treated as different.
Fix: Choose consistent format, redirect other version, update internal links.
119. Dynamic URLs vs. Static URLs
Problem: Dynamic parameters make URLs less user-friendly.
Fix: Implement URL rewriting for clean, static-looking URLs.
120. Keyword Stuffing in URLs
Problem: Overly optimized URLs look spammy.
Fix: Keep URLs concise with 3-5 words maximum, focus on readability.
121. Inconsistent URL Structure Across Site
Problem: Different URL patterns across sections confuse users and search engines.
Fix: Establish consistent URL structure, maintain site-wide.
122. URLs Not Matching Page Content
Problem: URL doesn’t reflect actual page topic.
Fix: Update URLs to match content (with proper redirects from old URLs).
123. Date-Based URLs for Non-News Content
Problem: Dates in URLs make content appear outdated.
Fix: Use date-independent URL structure for evergreen content.
124. Excessive Subdirectory Depth
Problem: URLs nested too deep (7+ levels).
Fix: Flatten site architecture, reduce directory levels.
125. Subdomain vs. Subdirectory Issues
Problem: Inconsistent use of subdomains and subdirectories.
Fix: Choose one approach consistently, use subdirectories for most content.
Category 7: Content Issues (126-155)
126. Missing Title Tags
Problem: Pages without title tags can’t communicate topic to search engines.
Fix: Add unique, descriptive title tags to all pages (50-60 characters).
127. Duplicate Title Tags
Problem: Multiple pages with identical titles compete with each other.
Fix: Create unique titles for each page reflecting specific content.
128. Multiple Title Tags on Same Page
Problem: Multiple title tags confuse search engines.
Fix: Keep only one title tag per page in head section.
129. Title Too Long
Problem: Titles over 60 characters get truncated in search results.
Fix: Shorten to 50-60 characters, front-load keywords.
130. Title Too Short
Problem: Titles under 30 characters waste valuable real estate.
Fix: Expand to 50-60 characters with relevant keywords and context.
131. Title Doesn’t Match Page Content
Problem: Misleading titles hurt CTR and user experience.
Fix: Ensure titles accurately describe page content.
132. Title and H1 Identical
Problem: Wastes opportunity to target related keywords.
Fix: Make H1 similar but not identical, use variations naturally.
133. Page Title and SERP Title Don’t Match
Problem: Google rewrites title based on query or other factors.
Fix: Improve title relevance, avoid keyword stuffing, make titles compelling.
134. Missing Meta Description
Problem: Search engines generate description from page content.
Fix: Write compelling meta descriptions (150-160 characters) for key pages.
135. Duplicate Meta Descriptions
Problem: Multiple pages with same description waste SEO potential.
Fix: Write unique descriptions for each important page.
136. Meta Description Too Long
Problem: Descriptions over 160 characters get truncated.
Fix: Keep to 150-160 characters, front-load important information.
137. Meta Description Too Short
Problem: Descriptions under 120 characters waste space.
Fix: Expand to 150-160 characters with benefit-focused copy.
138. Meta Description Doesn’t Include Target Keywords
Problem: Missing keywords reduces relevance signals.
Fix: Include target keywords naturally in description.
139. Missing H1 Tag
Problem: Page lacks primary heading indicating main topic.
Fix: Add one descriptive H1 tag to every page.
140. Multiple H1 Tags
Problem: Multiple H1s confuse topic hierarchy (though less critical with HTML5).
Fix: Use one H1 per page for primary topic, use H2-H6 for subtopics.
141. Empty H1 Tag
Problem: H1 exists but contains no text.
Fix: Add descriptive heading text to H1 tag.
142. H1 Not Descriptive
Problem: Generic H1 like “Welcome” provides no context.
Fix: Use descriptive H1 that includes target keywords.
143. Improper Heading Hierarchy
Problem: Skipping heading levels (H1 to H4) breaks logical structure.
Fix: Use sequential heading levels (H1→H2→H3), maintain logical hierarchy.
144. Low Word Count (Thin Content)
Problem: Pages under 200-300 words may be seen as low quality.
Fix: Expand content with valuable information, or consolidate with related pages.
145. Duplicate Content Across Pages
Problem: Same content on multiple URLs dilutes ranking potential.
Fix: Use canonical tags, 301 redirects, or noindex to consolidate.
146. Near-Duplicate Content
Problem: Very similar content across pages competes internally.
Fix: Differentiate content significantly, consolidate similar pages, use canonical.
147. Scraped or Copied Content
Problem: Content copied from other sites hurts rankings.
Fix: Create original content, add unique value, remove copied content.
148. Auto-Generated Content
Problem: Machine-generated content often lacks quality.
Fix: Edit for quality, add human insights, or remove entirely.
149. Doorway Pages
Problem: Thin pages created only to rank for keywords.
Fix: Consolidate into comprehensive pages with real value.
150. Content Not Matching Search Intent
Problem: Page doesn’t satisfy user intent for target keyword.
Fix: Analyze top-ranking pages, rewrite to match intent better.
151. Low Text-to-HTML Ratio
Problem: Excessive code compared to content slows crawling.
Fix: Move CSS/JS to external files, minimize inline code.
152. Hidden Text or Links
Problem: Text hidden from users but visible to crawlers.
Fix: Remove all hidden text, make all content user-visible.
153. Cloaking Content
Problem: Showing different content to users vs. search engines.
Fix: Remove cloaking, serve same content to all visitors.
154. Keyword Stuffing
Problem: Excessive keyword repetition looks manipulative.
Fix: Use keywords naturally and sparingly, focus on synonyms and related terms.
155. Missing or Poor Content Structure
Problem: Wall of text with no formatting or organization.
Fix: Use headings, bullet points, short paragraphs, whitespace.
Category 8: Image Optimization Issues (156-170)
156. Missing Alt Text on Images
Problem: Images lack descriptions for accessibility and SEO.
Fix: Add descriptive alt text to all images (under 125 characters).
157. Empty Alt Attributes (alt=””)
Problem: Intentionally empty alt on important images.
Fix: Add alt text for content images, keep empty only for decorative images.
158. Duplicate Alt Text
Problem: Multiple images with identical alt text.
Fix: Write unique descriptions for each image.
159. Keyword-Stuffed Alt Text
Problem: Alt text overly optimized with keywords.
Fix: Write natural descriptions, include keywords only when relevant.
160. Alt Text Too Long
Problem: Excessively long alt text is cut off or ignored.
Fix: Keep alt text concise, under 125 characters.
161. Images Without Title Attributes
Problem: Missing title attribute (though less critical than alt).
Fix: Add title attributes for additional context where helpful.
162. Broken Images (404)
Problem: Image URLs return 404 errors.
Fix: Upload missing images, fix image URLs, remove references to deleted images.
163. Images Too Large (File Size)
Problem: Unoptimized images slow page load significantly.
Fix: Compress images, use appropriate formats (WebP, AVIF), implement lazy loading.
164. Wrong Image Format
Problem: Using PNG for photos or JPG for graphics with transparency.
Fix: Use JPG for photos, PNG for graphics, WebP for both.
165. Missing Image Dimensions
Problem: No width/height attributes cause layout shift.
Fix: Specify explicit dimensions for all images to prevent CLS.
166. Images Not Responsive
Problem: Images don’t scale for different screen sizes.
Fix: Use responsive images with srcset attribute.
167. Images Using Data URIs Excessively
Problem: Inline images increase HTML size unnecessarily.
Fix: Use external image files, apply data URIs selectively for tiny images only.
168. Hotlinking Images
Problem: Loading images from other domains without permission.
Fix: Host images on your domain, or get permission.
169. Images Redirecting
Problem: Image URLs redirect before serving file.
Fix: Update image URLs to final destination.
170. Images Blocked by Robots.txt
Problem: Images can’t be indexed in Google Images.
Fix: Remove image blocking rules from robots.txt.
Category 9: Mobile Usability Issues (171-185)
171. Missing Viewport Meta Tag
Problem: Page doesn’t adapt to mobile screen sizes.
Fix: Add viewport tag: <meta name="viewport" content="width=device-width, initial-scale=1">.
172. Content Wider Than Screen
Problem: Horizontal scrolling required on mobile.
Fix: Use responsive design, avoid fixed-width elements, test on devices.
173. Text Too Small to Read
Problem: Font size under 16px hard to read on mobile.
Fix: Use minimum 16px base font size, increase for better readability.
174. Tap Targets Too Small
Problem: Buttons/links under 48x48px difficult to tap.
Fix: Make tap targets minimum 48x48px with adequate spacing.
175. Tap Targets Too Close Together
Problem: Adjacent elements cause accidental taps.
Fix: Add spacing between clickable elements (minimum 8px).
176. Uses Incompatible Plugins (Flash)
Problem: Flash and other plugins don’t work on mobile.
Fix: Replace with HTML5, use modern web technologies.
177. Viewport Not Set Correctly
Problem: Viewport width set to fixed value instead of device-width.
Fix: Use device-width in viewport meta tag.
178. Mobile Popup Issues
Problem: Intrusive interstitials block mobile content.
Fix: Use non-intrusive popups, easy-to-close, not covering main content.
179. Horizontal Scrolling Issues
Problem: Page requires horizontal scrolling on mobile.
Fix: Use flexible layouts, avoid fixed-width containers.
180. Font Too Large
Problem: Oversized fonts waste screen space on mobile.
Fix: Optimize font sizing for mobile viewports.
181. Mobile Site in Separate Subdomain (m.site.com)
Problem: Separate mobile site creates duplicate content issues.
Fix: Use responsive design instead, or implement proper alternate/canonical tags.
182. Missing Mobile Alternate Tags
Problem: Desktop and mobile versions not properly linked.
Fix: Implement rel=”alternate” and rel=”canonical” between versions.
183. Mobile Page Loading Slow
Problem: Mobile-specific performance issues.
Fix: Optimize for mobile specifically, reduce resource size, use AMP if appropriate.
184. Touch Gestures Not Working
Problem: Swipe, pinch, or other gestures fail.
Fix: Implement proper touch event handlers, test on devices.
185. Mobile Navigation Issues
Problem: Menu difficult to use on mobile.
Fix: Implement hamburger menu or mobile-friendly navigation.
Category 10: Page Speed & Core Web Vitals Issues (186-210)
186. Poor Largest Contentful Paint (LCP)
Problem: Main content takes over 2.5 seconds to load.
Fix: Optimize images, improve server response, remove render-blocking resources.
187. Poor First Input Delay (FID)
Problem: Page not interactive within 100ms.
Fix: Minimize JavaScript execution, break up long tasks, use web workers.
188. Poor Interaction to Next Paint (INP)
Problem: Slow response to user interactions.
Fix: Optimize JavaScript, reduce main thread work, defer non-critical scripts.
189. Poor Cumulative Layout Shift (CLS)
Problem: Visual instability as page loads (score over 0.1).
Fix: Set size attributes on images/videos, avoid inserting content above existing content.
190. Slow Page Load Speed (Overall)
Problem: Total page load time over 3 seconds.
Fix: Optimize all resources, implement caching, use CDN, compress files.
191. Uncompressed Resources
Problem: Files not using GZIP or Brotli compression.
Fix: Enable compression on server, verify with browser dev tools.
192. Uncached JavaScript and CSS Files
Problem: No browser caching for static resources.
Fix: Set cache-control headers with appropriate expiration times.
193. Unminified JavaScript
Problem: JavaScript contains unnecessary whitespace and comments.
Fix: Minify all JavaScript files, use build tools.
194. Unminified CSS
Problem: CSS files not optimized for size.
Fix: Minify CSS, remove unused styles.
195. Render-Blocking Resources
Problem: CSS/JS blocks initial page rendering.
Fix: Defer non-critical JS, inline critical CSS, use async/defer attributes.
196. Too Many HTTP Requests
Problem: Excessive requests slow page loading.
Fix: Combine files, use sprites, implement lazy loading, reduce third-party scripts.
197. Large JavaScript Bundle Size
Problem: Massive JS files slow parsing and execution.
Fix: Code-split large bundles, lazy load modules, tree-shake unused code.
198. CSS File Size Too Large
Problem: Bloated CSS slows rendering.
Fix: Remove unused CSS, minify, split into critical and non-critical.
199. Too Many JavaScript and CSS Files
Problem: Multiple separate files increase overhead.
Fix: Bundle files appropriately, but balance with HTTP/2 multiplexing benefits.
200. Slow DNS Lookup
Problem: DNS resolution takes too long.
Fix: Use fast DNS provider, implement DNS prefetching for external resources.
201. Slow Server Response (Backend Processing)
Problem: Server takes too long to generate response.
Fix: Optimize database queries, implement caching, upgrade server resources.
202. No Content Delivery Network (CDN)
Problem: Static resources served from single origin.
Fix: Implement CDN for global content delivery, reduce latency.
203. Third-Party Scripts Slowing Page
Problem: External scripts blocking or delaying page load.
Fix: Defer or async load third-party scripts, evaluate necessity of each script.
204. Excessive DOM Size
Problem: DOM with over 1500 nodes slows rendering.
Fix: Simplify HTML structure, remove unnecessary elements, paginate long content.
205. Heavy Main-Thread Work
Problem: Long JavaScript tasks block main thread.
Fix: Break up long tasks, use web workers, optimize JavaScript execution.
206. Large Network Payloads
Problem: Total page size over 5MB.
Fix: Optimize images, lazy load content, reduce resource sizes.
207. Images Not Lazy Loaded
Problem: All images load immediately regardless of visibility.
Fix: Implement lazy loading for below-fold images.
208. No Preload for Critical Resources
Problem: Browser doesn’t prioritize critical resources.
Fix: Use preload for critical fonts, CSS, above-fold images.
209. No Prefetch for Next Pages
Problem: Next page resources not preloaded.
Fix: Implement prefetch for likely next page destinations.
210. Inefficient Cache Policy
Problem: Static resources cached too briefly or not at all.
Fix: Set long cache times for versioned static assets (1 year).
Category 11: HTTPS & Security Issues (211-225)
211. Site Not Using HTTPS
Problem: Unencrypted site is insecure and penalized by Google.
Fix: Install SSL certificate, redirect all traffic to HTTPS.
212. Mixed Content (HTTPS/HTTP)
Problem: HTTPS page loads HTTP resources, triggering warnings.
Fix: Update all resource URLs to HTTPS, use protocol-relative URLs.
213. SSL Certificate Expired
Problem: Expired certificate shows security warnings.
Fix: Renew certificate, set up auto-renewal.
214. SSL Certificate Invalid
Problem: Certificate has errors or doesn’t match domain.
Fix: Get valid certificate for your domain, fix certificate chain.
215. SSL Certificate Name Mismatch
Problem: Certificate issued for different domain.
Fix: Get certificate matching your exact domain name.
216. Old TLS/SSL Protocol
Problem: Using outdated TLS 1.0 or 1.1 protocols.
Fix: Upgrade to TLS 1.2 or 1.3, disable old protocols.
217. Weak Cipher Suites
Problem: Using insecure encryption methods.
Fix: Configure strong cipher suites, disable weak encryption.
218. Missing HSTS Header
Problem: No HTTP Strict Transport Security implemented.
Fix: Add HSTS header, consider preload list.
219. HSTS Max-Age Too Short
Problem: HSTS expires too quickly.
Fix: Set max-age to at least 31536000 (1 year).
220. Missing Secure Flag on Cookies
Problem: Cookies transmitted over HTTP.
Fix: Set Secure flag on all cookies for HTTPS sites.
221. Missing HttpOnly Flag on Cookies
Problem: Cookies accessible via JavaScript, XSS vulnerability.
Fix: Set HttpOnly flag on session cookies.
222. Missing SameSite Attribute on Cookies
Problem: Cookies vulnerable to CSRF attacks.
Fix: Set SameSite=Strict or Lax on cookies.
223. Missing Content Security Policy (CSP)
Problem: No protection against XSS attacks.
Fix: Implement Content-Security-Policy header.
224. Missing X-Frame-Options Header
Problem: Site can be framed by malicious sites (clickjacking).
Fix: Add X-Frame-Options: DENY or SAMEORIGIN header.
225. Missing X-Content-Type-Options Header
Problem: MIME type sniffing vulnerability.
Fix: Add X-Content-Type-Options: nosniff header.
Category 12: XML Sitemap Issues (226-240)
226. Missing XML Sitemap
Problem: Search engines have harder time discovering all pages.
Fix: Generate XML sitemap, submit to search engines.
227. Sitemap Not Listed in Robots.txt
Problem: Crawlers may not discover sitemap.
Fix: Add Sitemap: URL directive to robots.txt.
228. Sitemap Not Submitted to Search Console
Problem: Search engines not notified of sitemap location.
Fix: Submit sitemap URL in Google Search Console and Bing Webmaster.
229. Sitemap Syntax Errors (XML Errors)
Problem: Malformed XML prevents sitemap processing.
Fix: Validate sitemap XML, fix formatting errors.
230. Sitemap Too Large (Over 50MB)
Problem: Sitemap exceeds size limits.
Fix: Split into multiple sitemaps, use sitemap index file.
231. Sitemap Has Over 50,000 URLs
Problem: Exceeds URL limit per sitemap.
Fix: Split into multiple sitemaps, use sitemap index.
232. Sitemap Not Accessible (404 Error)
Problem: Sitemap URL returns 404.
Fix: Ensure sitemap exists at declared location, check file permissions.
233. Sitemap in Wrong Format
Problem: Not standard XML format.
Fix: Use proper XML sitemap format, reference sitemap protocol.
234. 4XX Pages in Sitemap
Problem: Broken pages included in sitemap.
Fix: Remove 404 pages, only include accessible URLs.
235. 5XX Pages in Sitemap
Problem: Error pages included in sitemap.
Fix: Remove pages with server errors, fix underlying issues.
236. Redirected Pages in Sitemap
Problem: Sitemap contains URLs that redirect.
Fix: Include only final destination URLs.
237. Noindex Pages in Sitemap
Problem: Non-indexable pages in sitemap send mixed signals.
Fix: Remove noindexed pages from sitemap.
238. Non-Canonical Pages in Sitemap
Problem: Duplicate versions in sitemap instead of canonical.
Fix: Include only canonical URLs in sitemap.
239. Outdated Sitemap (Not Updated)
Problem: Sitemap doesn’t reflect current site structure.
Fix: Regenerate sitemap regularly, automate if possible.
240. URLs Decreased in Sitemap
Problem: Significant drop in sitemap URLs.
Fix: Investigate reason (deleted pages, technical issue), ensure legitimate.
Category 13: Structured Data & Schema Issues (241-255)
241. Missing Schema Markup
Problem: No structured data to enhance search results.
Fix: Implement relevant schema types (Article, Product, etc.).
242. Invalid Schema Markup
Problem: Structured data has errors or missing required fields.
Fix: Validate with Google’s Rich Results Test, fix errors.
243. Schema.org Validation Errors
Problem: Markup doesn’t follow schema.org specifications.
Fix: Reference official documentation, fix property names and values.
244. Google Rich Results Validation Errors
Problem: Markup won’t trigger rich results in Google.
Fix: Fix issues identified in Rich Results Test tool.
245. Incorrect Schema Type Used
Problem: Using wrong schema type for content.
Fix: Use appropriate schema type (Article, BlogPosting, Product, etc.).
246. Missing Required Properties
Problem: Schema missing mandatory fields.
Fix: Add all required properties for chosen schema type.
247. Multiple Conflicting Schema Types
Problem: Same content marked up with incompatible types.
Fix: Use one primary schema type, nest others appropriately.
248. Schema Markup Not Matching Visible Content
Problem: Structured data describes content not on page.
Fix: Ensure markup accurately reflects visible page content.
249. Microdata vs JSON-LD Inconsistencies
Problem: Using multiple formats with conflicting information.
Fix: Use JSON-LD (Google’s preferred format), remove other formats.
250. Missing Organization Schema
Problem: No structured data about your company.
Fix: Add Organization schema to homepage with logo, contact info.
251. Missing LocalBusiness Schema
Problem: Local business without proper structured data.
Fix: Implement LocalBusiness schema with address, hours, etc.
252. Breadcrumb Schema Missing or Incorrect
Problem: Breadcrumb trail not marked up properly.
Fix: Add BreadcrumbList schema matching visible breadcrumbs.
253. FAQ Schema Issues
Problem: FAQ markup invalid or incomplete.
Fix: Follow FAQ schema requirements, validate markup.
254. Review Schema Violations
Problem: Fake or manipulated review markup.
Fix: Only mark up genuine reviews, follow Google guidelines.
255. Product Schema Missing Required Fields
Problem: Product markup incomplete (price, availability, etc.).
Fix: Add all required product properties.
Category 14: International & Hreflang Issues (256-270)
256. Missing Hreflang Tags
Problem: International versions not connected properly.
Fix: Implement hreflang for all language/region variations.
257. Hreflang Annotation Invalid
Problem: Incorrect language-region codes.
Fix: Use proper ISO codes (en-US, de-DE, etc.).
258. Missing Reciprocal Hreflang (No Return-Tag)
Problem: Hreflang not bidirectional between pages.
Fix: Ensure all linked pages reference each other.
259. Hreflang to Non-Canonical Pages
Problem: Hreflang points to duplicate versions.
Fix: Point hreflang only to canonical URLs.
260. Hreflang to Redirect or Broken Page
Problem: Hreflang target URL has errors.
Fix: Update to working final URLs.
261. Multiple Pages for Same Language in Hreflang
Problem: Conflicting hreflang signals for one language.
Fix: Use one page per language-region combination.
262. Hreflang and HTML Lang Mismatch
Problem: Different language codes in hreflang vs. HTML lang attribute.
Fix: Ensure both match actual page language.
263. Missing X-Default Hreflang
Problem: No default page for unmatched languages.
Fix: Specify x-default hreflang for fallback page.
264. Self-Reference Hreflang Missing
Problem: Page doesn’t include hreflang to itself.
Fix: Always include self-referencing hreflang.
265. HTML Lang Attribute Missing
Problem: No language declared in HTML tag.
Fix: Add lang attribute: <html lang="en">.
266. HTML Lang Attribute Invalid
Problem: Incorrect language code format.
Fix: Use valid ISO 639-1 codes.
267. Hreflang Defined But HTML Lang Missing
Problem: Hreflang present but no HTML lang declaration.
Fix: Add HTML lang attribute to match hreflang.
268. Not All Hreflang Pages Were Crawled
Problem: Some international versions inaccessible.
Fix: Ensure all versions are crawlable and working.
269. IP-Based Redirection Issues
Problem: Redirecting based on IP blocks search engines.
Fix: Use hreflang instead, allow crawler access to all versions.
270. Mixed Language Content on Single Page
Problem: Multiple languages on same page confuse signals.
Fix: Separate languages onto different pages with proper hreflang.
Category 15: JavaScript & Rendering Issues (271-285)
271. JavaScript Rendering Issues
Problem: Critical content only available after JS execution.
Fix: Implement server-side rendering or static generation.
272. Broken JavaScript Files
Problem: JS files return errors or don’t load.
Fix: Fix JS errors, check file paths, ensure proper hosting.
273. JavaScript Blocking Rendering
Problem: Synchronous JS blocks page display.
Fix: Use async or defer attributes, move scripts to footer.
274. HTTPS Page Links to HTTP JavaScript
Problem: Mixed content error with JavaScript files.
Fix: Update all JS URLs to HTTPS.
275. JavaScript Redirects Hiding Content
Problem: JS redirects prevent crawler from seeing content.
Fix: Use server-side redirects instead.
276. Important Content in JavaScript
Problem: Content generated only by JS may be missed by crawlers.
Fix: Pre-render content or use server-side rendering.
277. Infinite Scroll Not Crawlable
Problem: Paginated content only loads via JavaScript.
Fix: Implement pagination with proper URLs, use pushState.
278. JavaScript Navigation Issues
Problem: Single-page app navigation not crawlable.
Fix: Implement proper routing with unique URLs per view.
279. JavaScript Errors in Console
Problem: JS errors prevent proper functionality.
Fix: Debug and fix all JavaScript errors.
280. Lazy Loading Preventing Indexation
Problem: Content never loads for crawlers.
Fix: Use progressive enhancement, ensure content loads without scrolling for crawlers.
281. AJAX Content Not Indexable
Problem: Dynamic content loaded via AJAX not seen by crawlers.
Fix: Implement server-side rendering for critical content.
282. Missing Noscript Tags
Problem: No fallback content when JavaScript disabled.
Fix: Add noscript alternatives for critical content.
283. Heavy JavaScript Frameworks
Problem: React/Angular/Vue bundles slow page load.
Fix: Optimize bundle size, code-split, consider server-side rendering.
284. Third-Party JavaScript Issues
Problem: External scripts slow or break site.
Fix: Evaluate necessity, load asynchronously, consider removing.
285. JavaScript Build Process Errors
Problem: Minification or bundling creates bugs.
Fix: Test production builds thoroughly, use source maps.
Category 16: CSS Issues (286-295)
286. Broken CSS Files
Problem: CSS files return 404 or have errors.
Fix: Fix file paths, upload missing files, validate CSS syntax.
287. CSS File Size Too Large
Problem: Bloated CSS files slow page load.
Fix: Remove unused styles, minify CSS, split into critical/non-critical.
288. HTTPS Page Links to HTTP CSS
Problem: Mixed content warnings with stylesheets.
Fix: Update all CSS URLs to HTTPS.
289. Inline CSS Bloating HTML
Problem: Excessive inline styles increase page size.
Fix: Move styles to external stylesheet.
290. Critical CSS Not Inlined
Problem: Above-fold rendering delayed by external CSS.
Fix: Inline critical CSS, defer non-critical stylesheets.
291. Unused CSS Bloat
Problem: Loading styles not used on page.
Fix: Remove unused CSS, use PurgeCSS or similar tools.
292. CSS Rendering Blocking
Problem: Stylesheets block page rendering.
Fix: Inline critical CSS, preload fonts, defer non-critical CSS.
293. CSS Redirects
Problem: CSS URLs redirect before loading.
Fix: Update URLs to final destination.
294. Font Loading Issues
Problem: Web fonts block text rendering (FOIT/FOUT).
Fix: Use font-display: swap, preload critical fonts.
295. CSS !important Overuse
Problem: Excessive !important indicates poor CSS architecture.
Fix: Refactor CSS specificity, reduce !important usage.
Category 17: Social Media & Open Graph Issues (296-305)
296. Missing Open Graph Tags
Problem: Poor appearance when shared on social media.
Fix: Add OG tags (og:title, og:description, og:image, og:url).
297. Open Graph Tags Incomplete
Problem: Some required OG properties missing.
Fix: Include all essential OG tags for proper social sharing.
298. Open Graph URL Not Matching Canonical
Problem: OG URL differs from canonical URL.
Fix: Ensure og:url matches canonical URL.
299. Open Graph Image Missing or Wrong Size
Problem: Image doesn’t display properly in social shares.
Fix: Use 1200x630px image, ensure proper format and size.
300. Twitter Card Tags Missing
Problem: Poor Twitter share appearance.
Fix: Add Twitter Card meta tags (twitter:card, twitter:title, etc.).
301. Twitter Card Incomplete
Problem: Missing required Twitter Card properties.
Fix: Complete all necessary Twitter Card tags.
302. Twitter Card and Open Graph Conflict
Problem: Conflicting information between OG and Twitter tags.
Fix: Ensure consistency, or let Twitter fall back to OG tags.
303. Social Media Image Not Optimized
Problem: Social share image too large or wrong dimensions.
Fix: Optimize to 1200x630px, under 1MB, proper compression.
304. Missing Social Profile Markup
Problem: Social media accounts not connected via schema.
Fix: Add sameAs properties in Organization schema.
305. Facebook Domain Verification Missing
Problem: Can’t use advanced Facebook features.
Fix: Verify domain ownership in Facebook Business Manager.
Category 18: E-commerce Specific Issues (306-320)
306. Missing Product Schema
Problem: Products don’t appear in rich results.
Fix: Implement Product schema with required properties.
307. Out of Stock Products Indexed
Problem: Unavailable products showing in search.
Fix: Use proper availability markup, consider noindex for permanently unavailable.
308. Product Variants Creating Duplicates
Problem: Color/size variations seen as duplicate content.
Fix: Use canonical tags, implement proper variant structure.
309. Missing Price Information
Problem: Products lacking price in structured data.
Fix: Add price and currency to Product schema.
310. Missing Availability Information
Problem: Stock status not indicated in markup.
Fix: Add availability property (InStock, OutOfStock, PreOrder).
311. Faceted Navigation Issues
Problem: Filter combinations creating massive duplicate content.
Fix: Use noindex on filters, canonical tags, robots.txt blocking.
312. Missing Breadcrumb Navigation
Problem: Users and search engines can’t understand site hierarchy.
Fix: Implement breadcrumbs with proper markup.
313. Pagination Issues on Category Pages
Problem: Paginated listings not properly handled.
Fix: Use rel=next/prev, or canonical to view-all, or self-referencing canonicals.
314. Missing Review Schema
Problem: Product reviews not marked up properly.
Fix: Implement Review or AggregateRating schema.
315. Filter URLs Not Managed
Problem: Every filter combination indexed separately.
Fix: Use parameter handling, canonical tags, or noindex.
316. Checkout/Cart Pages Indexed
Problem: Transactional pages in search results.
Fix: Noindex all checkout process pages, shopping cart.
317. Missing Offer Schema
Problem: Special offers not marked up.
Fix: Use Offer schema type with price and availability.
318. Product Images Not Optimized
Problem: High-resolution images slow product pages.
Fix: Optimize images, use multiple sizes, implement lazy loading.
319. Missing Size/Color Selectors in Structured Data
Problem: Variants not properly described.
Fix: Use PropertyValue to indicate available options.
320. Search Results Pages Indexed
Problem: Internal search results creating duplicate content.
Fix: Noindex all search result pages.
Category 19: Advanced Technical Issues (321-340)
321. Duplicate H1 and Title Tags
Problem: Wasting keyword targeting opportunity.
Fix: Make H1 and title similar but not identical.
322. Missing Favicon
Problem: No icon displays in browser tabs or bookmarks.
Fix: Create and implement favicon.ico in root directory.
323. Inefficient Database Queries
Problem: Slow queries increase page generation time.
Fix: Optimize queries, add indexes, use caching.
324. Memory Leaks
Problem: JavaScript memory leaks slow page over time.
Fix: Fix event listener management, clear intervals, profile memory usage.
325. Render-Blocking Fonts
Problem: Custom fonts delay text rendering.
Fix: Use font-display: swap, preload critical fonts.
326. AMP Validation Errors
Problem: AMP pages don’t validate properly.
Fix: Fix AMP HTML errors, validate with AMP validator.
327. Missing AMP Canonical
Problem: AMP version not linked to canonical HTML version.
Fix: Implement proper amphtml/canonical linking.
328. PWA Implementation Issues
Problem: Progressive Web App features not working.
Fix: Fix service worker, manifest file, ensure HTTPS.
329. Manifest File Errors
Problem: Web app manifest invalid or missing.
Fix: Create valid manifest.json with required properties.
330. Service Worker Issues
Problem: Service worker failing or not registered.
Fix: Debug service worker code, check registration, verify scope.
331. WebP Support Missing
Problem: Not using modern image formats.
Fix: Implement WebP with fallbacks for older browsers.
332. Preload/Prefetch Misconfiguration
Problem: Wrong resources prioritized or prefetched.
Fix: Preload critical assets only, prefetch likely next pages.
333. DNS Prefetch Missing
Problem: External domain lookups not optimized.
Fix: Add dns-prefetch for external resources.
334. Preconnect Missing for Critical Origins
Problem: Third-party connections not prioritized.
Fix: Add preconnect for critical external resources.
335. HTTP/2 Server Push Misconfiguration
Problem: Pushing wrong resources or over-pushing.
Fix: Carefully select resources to push, monitor performance.
336. Brotli Compression Not Enabled
Problem: Missing superior compression for text files.
Fix: Enable Brotli compression on server for supported browsers.
337. Resource Hints Missing
Problem: Not using prefetch, preload, or preconnect.
Fix: Implement appropriate resource hints for performance.
338. Client-Side Routing Issues
Problem: SPA routing not SEO-friendly.
Fix: Implement proper history API usage, unique URLs per view.
339. Polyfill Bloat
Problem: Loading unnecessary polyfills for modern browsers.
Fix: Use conditional loading, serve different bundles based on browser.
340. Source Maps Exposed in Production
Problem: Debugging files accessible publicly.
Fix: Remove source maps from production, or restrict access.
Category 20: Content Delivery & Hosting (341-350)
341. No CDN Implementation
Problem: All content served from single origin.
Fix: Implement CDN for static assets and global delivery.
342. CDN Configuration Errors
Problem: CDN not caching properly or serving stale content.
Fix: Configure proper cache rules, purging, and TTLs.
343. Geo-Targeting Issues
Problem: Content not served from nearest server location.
Fix: Use CDN with global POPs, implement proper geo-routing.
344. Asset Domain Not Using CDN
Problem: Static assets still served from origin server.
Fix: Move all static assets to CDN.
345. Shared Hosting Resource Limits
Problem: Server resources shared with other sites affecting performance.
Fix: Upgrade to VPS or dedicated hosting.
346. Server Location Far from Target Audience
Problem: High latency for primary users.
Fix: Move to data center closer to audience, or use CDN.
347. No Load Balancing
Problem: Single server creates bottleneck and failure point.
Fix: Implement load balancing across multiple servers.
348. Database Server on Same Machine as Web Server
Problem: Resource competition slows both services.
Fix: Separate database and web servers.
349. No Failover System
Problem: Server failure takes entire site offline.
Fix: Implement redundancy and failover configuration.
350. Server Not Optimized for CMS
Problem: Default server config not tuned for WordPress/other CMS.
Fix: Optimize server configuration for specific CMS requirements.
Category 21: Monitoring & Maintenance Issues (351-360)
351. Google Search Console Not Set Up
Problem: Missing critical search performance and error data.
Fix: Verify site in Google Search Console, monitor regularly.
352. Bing Webmaster Tools Not Set Up
Problem: Missing Bing-specific insights and errors.
Fix: Verify site in Bing Webmaster Tools.
353. No Uptime Monitoring
Problem: Unaware when site goes down.
Fix: Implement uptime monitoring service with alerts.
354. No Performance Monitoring
Problem: Don’t track page speed over time.
Fix: Use tools like Google PageSpeed Insights, WebPageTest regularly.
355. No Broken Link Monitoring
Problem: 404 errors accumulate unnoticed.
Fix: Implement regular broken link checks, set up alerts.
356. No Log File Analysis
Problem: Missing insights from server and crawler logs.
Fix: Regularly analyze logs for crawl patterns, errors, bot activity.
357. No Rank Tracking
Problem: Unaware of search visibility changes.
Fix: Implement keyword rank tracking tool.
358. No Competitor Monitoring
Problem: Unaware of competitive landscape changes.
Fix: Monitor competitor technical implementations and rankings.
359. Security Scanning Not Implemented
Problem: Vulnerabilities and malware undetected.
Fix: Implement regular security scanning and malware detection.
360. No Regular Technical Audits
Problem: Issues accumulate over time.
Fix: Schedule monthly or quarterly comprehensive technical audits.
Category 22: CMS & Platform-Specific Issues (361-370)
361. WordPress Admin Accessible to Public
Problem: Login page exposed for brute force attacks.
Fix: Use security plugin, limit login attempts, use strong passwords, consider hiding login URL.
362. WordPress xmlrpc.php Exploitable
Problem: XML-RPC endpoint targeted for attacks.
Fix: Disable XML-RPC if not needed, or restrict access.
363. Plugin/Theme Vulnerabilities
Problem: Outdated plugins/themes contain security holes.
Fix: Keep all software updated, remove unused plugins/themes.
364. Too Many Plugins Installed
Problem: Excessive plugins slow site and increase vulnerability.
Fix: Remove unnecessary plugins, consolidate functionality.
365. Database Not Optimized
Problem: WordPress database bloated with revisions, spam, etc.
Fix: Optimize database regularly, limit post revisions, clean spam.
366. Category/Tag Pages Thin Content
Problem: Taxonomy pages with no unique content rank poorly.
Fix: Add unique descriptions, or noindex thin taxonomy pages.
367. Author Archives Creating Duplicates
Problem: Author pages duplicate blog content.
Fix: Noindex author archives or add unique author content.
368. Date Archives Indexed
Problem: Date-based archives create duplicate content.
Fix: Noindex all date archives.
369. Attachment Pages Indexed
Problem: Separate pages for media files in search results.
Fix: Redirect attachment pages to parent post or media file.
370. WP-JSON Endpoint Exposed
Problem: WordPress REST API publicly accessible.
Fix: Restrict if not needed, or limit access to authenticated users.
Category 23: Local SEO Technical Issues (371-380)
371. Missing Google Business Profile
Problem: Not appearing in local search results.
Fix: Create and optimize Google Business Profile.
372. NAP Inconsistencies Across Web
Problem: Different Name, Address, Phone on various listings.
Fix: Standardize NAP across all online properties.
373. Missing LocalBusiness Schema
Problem: Local signals not communicated to search engines.
Fix: Implement LocalBusiness structured data.
374. No Embedded Google Map
Problem: Missing trust signal and user convenience.
Fix: Embed Google Map showing business location.
375. Location Pages Missing for Multi-Location Business
Problem: Each location not represented by unique page.
Fix: Create unique pages for each physical location.
376. Location Pages Are Duplicates
Problem: Same content across location pages.
Fix: Create unique content for each location page.
377. Missing City/Service Landing Pages
Problem: Not targeting specific local search terms.
Fix: Create location-specific service pages.
378. Phone Numbers Not Clickable
Problem: Mobile users can’t tap to call.
Fix: Use tel: links for all phone numbers.
379. Hours of Operation Not Marked Up
Problem: Business hours not in structured data.
Fix: Add openingHours property to LocalBusiness schema.
380. No Physical Address on Website
Problem: Local trust signals missing.
Fix: Display complete address prominently, include in footer/contact page.
Category 24: Emerging Technologies & AI (381-390)
381. Missing llms.txt File
Problem: AI search engines lack guidance on using your content.
Fix: Create llms.txt in root directory following specifications.
382. No AI Crawler Management
Problem: AI bots crawling aggressively without control.
Fix: Use robots.txt to manage AI crawler access if desired.
383. Content Not Optimized for AI Summaries
Problem: Content difficult for AI to extract and summarize.
Fix: Use clear structure, headings, concise paragraphs.
384. Schema Markup Not AI-Friendly
Problem: Structured data not leveraged by AI systems.
Fix: Implement comprehensive, accurate schema markup.
385. No Voice Search Optimization
Problem: Content not optimized for voice queries.
Fix: Target long-tail conversational keywords, use question formats.
386. Featured Snippet Optimization Lacking
Problem: Not appearing in position zero.
Fix: Structure content to answer specific questions concisely.
387. FAQ Pages Not Properly Implemented
Problem: FAQ content not marked up or structured well.
Fix: Create FAQ pages with proper schema, clear Q&A format.
388. How-To Content Missing Schema
Problem: Instructional content not marked up for rich results.
Fix: Implement HowTo schema for step-by-step guides.
389. Video Structured Data Missing
Problem: Video content not appearing in video search.
Fix: Implement VideoObject schema for all videos.
390. Podcast Structured Data Missing
Problem: Podcast episodes not properly discoverable.
Fix: Implement PodcastEpisode and PodcastSeries schema.
Conclusion & Next Steps
This comprehensive checklist of 390+ technical SEO issues covers virtually every technical problem that can impact your website’s search engine performance. While this list may seem overwhelming, remember that:
Prioritization is Key: Not all issues have equal impact. Focus first on critical errors (server issues, indexation problems, HTTPS), then work through warnings and optimization opportunities.
Regular Auditing Essential: Technical SEO is not a one-time task. Schedule regular audits to catch new issues before they impact rankings:
- Weekly: Monitor Google Search Console for critical errors
- Monthly: Run comprehensive crawl with technical SEO tools
- Quarterly: Full technical audit covering all categories
- After major changes: Audit whenever making significant site updates
Start Small, Build Momentum: If you’re new to technical SEO, start with the most critical categories:
- Fix server errors and accessibility issues
- Resolve indexation problems
- Implement HTTPS properly
- Optimize page speed and Core Web Vitals
- Fix mobile usability issues
- Then work through other categories systematically
Use the Right Tools:
- Google Search Console (free, essential)
- Screaming Frog SEO Spider (comprehensive crawling)
- GTmetrix or PageSpeed Insights (performance)
- Mobile-Friendly Test (mobile optimization)
- Rich Results Test (structured data)
- Security Headers (security configuration)
Keep Learning: Technical SEO evolves constantly. Search engines update algorithms, web standards change, and new best practices emerge. Stay current through:
- Following Google Search Central Blog
- Reading technical SEO industry publications
- Testing and learning from your own implementations
- Attending webinars and conferences
When to Get Help: Some technical SEO issues require specialized expertise:
- Complex server configuration
- Large-scale migrations
- JavaScript rendering problems
- International multi-language implementations
- Enterprise-level technical architecture
At Salam Experts, we specialize in diagnosing and resolving all categories of technical SEO issues. Whether you have a few problems to fix or need a complete technical overhaul, our team has the expertise to optimize your website for maximum search engine performance.
Ready to fix your technical SEO issues? Contact Salam Experts today for a comprehensive technical audit. We’ll identify your most critical issues and create a prioritized action plan to improve your organic search visibility.
Schedule Your Free Technical SEO Consultation
