Technical SEO Checklist: 20 Critical Issues You Must Fix for Higher Rankings

1. Crawlability & Indexation Audit (Points 1–5)

• 1. Fix Crawl Errors: Resolve 5xx server drops and eliminate 404 dead ends in Search Console.
• 2. Optimize Robots.txt: Verify that critical CSS, JS, and high-value landing pages are not accidentally blocked.
• 3. Submit XML Sitemaps: Ensure only 200-OK canonical URLs are included in your sitemap index.
• 4. Clean Redirect Chains: Eliminate multi-hop 301 redirect loops (A → B → C should be direct A → C).
• 5. Validate Canonical Tags: Prevent duplicate content issues from URL tracking parameters.

2. Performance & Core Web Vitals (Points 6–10)

• 6. Sub-2.5s LCP: Optimize hero assets and server TTFB.
• 7. Sub-0.1 CLS: Set explicit image dimensions and container heights.
• 8. Sub-200ms INP: Defer non-critical JavaScript to keep the main thread responsive.
• 9. Enable GZIP/Brotli: Compress text files for 70-80% smaller network payloads.
• 10. Convert Media to WebP: Implement modern image formats with native lazy-loading.

3. Mobile Architecture & Security (Points 11–15)

• 11. Mobile Usability: Pass Google mobile-friendly criteria across all touch targets.
• 12. Strict HTTPS: Enforce SSL encryption with zero mixed-content HTTP warnings.
• 13. Clean URL Structures: Use short, hyphen-separated, lowercase keyword URLs.
• 14. Orphan Page Resolution: Ensure every indexed page has at least 2 internal inbound links.
• 15. Custom 404 Page: Provide helpful navigation search links on broken URL visits.

4. Structured Data & Link Architecture (Points 16–20)

• 16. Organization & WebSite Schema: Establish clear brand entity identity in Google.
• 17. BreadcrumbList Schema: Enable rich breadcrumb trails in search snippets.
• 18. Service / Product Schema: Provide machine-readable pricing and feature specifications.
• 19. FAQPage Schema: Qualify for expandable FAQ dropdowns in search results.
• 20. Descriptive Anchor Text: Replace generic 'click here' links with semantic descriptive anchors.