Keeping sites in Google

Is a page noindexed? A free checker names the meta tag, header or redirect hop responsible, plus how to check by hand with view-source and curl in two steps.

X-Robots-Tag is a noindex sent as an HTTP header by the server, host or CDN, never in the page. Where it comes from, how to find it with curl, how to remove it.

The five reasons a site drops out of Google after a migration, the Search Console sign of each, an eight-step checklist, and what Google says about recovery.

Why Search Console shows a page as indexed but blocked by robots.txt, where the rule comes from, and the order to fix it in so Google can read your noindex.

Why Search Console says a page is excluded by a noindex tag, the four usual causes, and how to find and remove the noindex so Google indexes the page again.