Troubleshooting An old SEO tip says put `noindex,follow` on paginated pages. Google treats long-term noindex,follow as noindex,nofollow, so articles reachable only via page 2+ quietly drop out of the index. Here is the fix.
Troubleshooting You added `<meta name="robots" content="noindex">` weeks ago but the page is still in Google. The six reasons, in hit-rate order, with the curl checks to tell them apart.
Troubleshooting A template default, env leak, or CDN header left `noindex` on pages that should be public. How to find the real source, remove it, and force a clean re-crawl.