Audit technical SEO — meta tags, structured data, Open Graph, sitemaps, robots.txt, performance, and accessibility signals.

SEO Auditing Check and fix technical SEO issues in a web project. Audit Checklist 1. Meta Tags Every page must have: Check for: [ ] Unique <title per page (50 60 chars) [ ] Unique <meta description per page (120 155 chars) [ ] Canonical URL set (avoids duplicate content) [ ] No noindex on pages that should be indexed 2. Open Graph & Social OG image should be 1200x630px Test with https://developers.facebook.com/tools/debug/ and https://cards dev.twitter.com/validator 3. Structured Data (JSON LD) Add schema markup for rich search results: Common types: Article , Product , FAQPage , Organization , BreadcrumbList Test with: https://search.google.com/test/rich results 4. Sitemap /sitemap.xml should: List all indexable pages Include <lastmod dates Exclude pages with noindex Be under 50MB / 50,000 URLs per file Be referenced in robots.txt 5. Robots.txt /robots.txt should: Not block CSS/JS files (search engines need them to render) Not block pages you want indexed 6. Performance (Core Web Vitals) Metric Good Needs Work LCP (Largest Contentful Paint) < 2.5s 4.0s INP (Interaction to Next Paint) < 200ms 500ms CLS (Cumulative Layout Shift) < 0.1 0.25 Key fixes: Compress and lazy load images Preload critical fonts and CSS Avoid layout shifts from dynamic content Use next/image or equivalent for automatic optimization 7. Crawlability [ ] All important pages are reachable from internal links [ ] No orphan pages (pages with zero internal links) [ ] No redirect chains (A→B→C should be A→C) [ ] 404 pages return proper HTTP 404 status [ ] No broken internal links 8. Accessibility (SEO Signals) [ ] All images have alt text [ ] Heading hierarchy is correct (one h1 , then h2 , h3 etc.) [ ] Links have descriptive text (not "click here") [ ] Language attribute set: <html lang="en" Quick Automated Check Tips Run Lighthouse in Chrome DevTools → check SEO score Google Search Console is the source of truth for indexing issues Mobile friendliness is a ranking factor — test on mobile viewports Page speed directly affects rankings — optimize Core Web Vitals

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