Technical SEO Audit Checklist: 25 Issues That Kill Rankings in 2025
A comprehensive technical SEO audit catches issues that prevent Google from properly crawling, indexing, and ranking your pages. This checklist covers the 25 most common and impactful issues we find.
Crawlability Issues (Critical)
1. Robots.txt blocking important URLs. 2. Orphan pages with no internal links. 3. JavaScript-rendered content that Googlebot can't execute. 4. Redirect chains exceeding 3 hops. 5. Canonical tags pointing to incorrect URLs. Point 3 is especially relevant if your site uses React Server Components or JavaScript-heavy frameworks — server rendering resolves this entirely.
Indexation Issues (High Impact)
6. Pages indexed with noindex accidentally applied. 7. Thin content pages diluting crawl budget. 8. Duplicate content from URL parameters without canonical tags. 9. Hreflang implementation errors. 10. XML sitemap containing non-canonical or error URLs. All of these become visible once you understand how Google's 2025 algorithm evaluates content quality.
Core Web Vitals (Now a Ranking Factor)
11. LCP above 2.5s (measure per page type, not site average). 12. CLS caused by ads, embeds, or late-loading fonts. 13. INP above 200ms (the new Interaction to Next Paint metric replaces FID). 14. Render-blocking resources delaying page display.
Content and Structure Issues
15. Missing or duplicate H1 tags. 16. Title tags over 60 characters. 17. Meta descriptions over 155 characters. 18. Internal links using generic anchor text ("click here", "read more"). 19. Broken internal links. 20. Pages with no internal links pointing to them. For Google Ads campaigns, a clean technical foundation is essential — pages with high CLS scores see Quality Score penalties that inflate CPCs.
Security and Trust Issues
21. Missing HTTPS (or mixed content warnings). 22. Missing structured data on eligible content types. 23. Soft 404 pages returning 200 status. 24. Server-side 5xx errors during Googlebot crawls. 25. Missing or incorrect HSTS headers. Regular quarterly audits catch these before they compound into ranking losses. For local SEO specifically, technical issues on your location pages are a top cause of map pack ranking drops. If you'd like a full technical audit of your site,
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