Crawlability
Robots.txt allows what you want indexed. Internal linking reaches every important page in 3 clicks or fewer. Sitemap submitted to Google Search Console and Bing Webmaster Tools.
Indexability
Canonical tags on every page, self-referencing unless you deliberately consolidate. No accidental noindex tags on important pages. Duplicate content collapsed via canonicals or consolidated URLs.
Rendering
If your site is JavaScript-heavy, verify Google can render it. Server-side rendering or dynamic rendering is safest. Client-side-only React sites often have indexation issues.
Core Web Vitals
LCP under 2.5s, INP under 200ms, CLS under 0.1. Direct ranking factor and a conversion tax when broken.
HTTPS and security
HTTPS everywhere with valid certs. Redirect HTTP to HTTPS with 301s. Modern TLS ciphers only.
Structured data
JSON-LD schema for every content type. Test with Google's Rich Results tool. Fix warnings even if the page still validates.
International
Hreflang for multi-language sites. Consistent URL structure per language. XML sitemaps per language.