SEO Patterns

Constraints

• Unique <title> (50–60 chars) and <meta name="description"> (150–160 chars) on every public page — duplicates across pages are a defect.
• Canonical URL on every page. noindex only on admin/draft pages.
• Primary content must be server-rendered; client-only rendered content is not indexed.
• OG image 1200×630 px.
• Mobile page load under 3 s.

Structured Data (JSON-LD)

Server-rendered, and it must return 0 errors from Google's Rich Results Test (https://search.google.com/test/rich-results) before shipping. Extract to inspect locally:

curl -s https://example.com/page | pup 'script[type=application/ld+json] text{}' | jq .

Sitemap & robots.txt

Generate the XML sitemap dynamically from the data source (CMS, DB, filesystem) and reference it from robots.txt via Sitemap: https://example.com/sitemap.xml. Use a sitemap index above 50,000 URLs or 50 MB. Include <lastmod> only when it is accurate. Disallow: /admin/, /api/, /preview/.

Post-deploy: check Search Console for warnings; remove any accidental Disallow: entry and resubmit the sitemap.