Deindexing refers to a webpage being removed from a search engine’s index, meaning it can no longer appear in search results at all, whether intentionally (through a noindex tag) or unintentionally (due to a technical error or manual action).
Unintentional deindexing is a serious technical SEO issue, often caused by an accidental noindex tag, a robots.txt blocking error, or a significant quality or policy violation identified by the search engine.
Regularly monitoring index coverage through Google Search Console helps catch unexpected deindexing quickly, before it causes prolonged, significant traffic loss for affected pages.
Deindexing monitoring is a standard part of our Technical SEO service.