Indexability
noindex and X-Robots-Tag checked so the page can actually rank.
Canonical link
Points to the right URL — no duplicate-content confusion.
robots.txt crawlability
Search engines aren't accidentally blocked from the page.
XML sitemap
Discoverable and referenced so crawlers find your pages faster.
Server response time
TTFB — a crawl-budget and Core Web Vitals signal.
Structured data
JSON-LD schema markup search engines can parse directly.