Astro SEO Checklist 2026: 20 tactics ranked by impact
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A comprehensive, ranked checklist of 20 SEO tactics for Astro-based sites, ordered by impact. Covers canonical URLs, title tag rules, Article/BlogPosting JSON-LD with Person and Publisher schemas, Open Graph and Twitter cards, sitemap and robots.txt with 2026 AI crawler entries, image optimization with Astro's Image component, BreadcrumbList schema, llms.txt generation, Pagefind site search setup, HowTo and Speakable schemas, content collection validation with Zod (which caught 10 bugs in podcast frontmatter), pagination handling, and 301 redirects. Includes concrete code examples for each tactic and explains the reasoning behind each ranking.
Table of contents
What this article assumes 🔗Is Astro good for SEO? 🔗1. Canonical URLs on every page 🔗2. Title tag rules 🔗3. Article (or BlogPosting) JSON-LD with Person, image, and validation 🔗4. Per-post Open Graph and Twitter cards 🔗5. Unique meta description on every key page 🔗6. One <h1> per page, logical heading order 🔗7. Sitemap and robots.txt with the 2026 AI crawler list 🔗8. Astro <Image> for everything in src/assets/ , with proper alt 🔗9. First paragraph as definition or outcome 🔗10. Internal linking with descriptive anchor text 🔗11. BreadcrumbList schema 🔗12. URL structure and 301 redirects when slugs change 🔗13. llms.txt plus a build-time llms-full.txt 🔗14. Pagefind for site search 🔗15. HowTo schema for tutorial-style posts 🔗16. Speakable JSON-LD on Article schema 🔗17. Content collection schemas (the one that found 10 bugs) 🔗18. dateModified , shown to readers when distinct 🔗19. rel="prev" / rel="next" and noindex on pagination 🔗20. noindex the 404 page 🔗What’s next on my list 🔗Glossary 🔗Frequently asked questions 🔗What to actually do today 🔗References 🔗Sort: