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AI SEO Glossary

What is IndexNow?

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TL;DR — IndexNow is an open protocol that lets a website notify participating search engines the moment a URL is added, updated, or deleted, instead of waiting for the next crawl. A site submits changed URLs to a single endpoint with a verification key, and participating engines — Microsoft Bing and Yandex most prominently — share the notifications. For AI visibility the Bing connection is the point: Bing's index feeds Microsoft Copilot and is a retrieval source for ChatGPT, so IndexNow shortens the path from publishing a page to that page being retrievable in AI answers.

Definition & scope

IndexNow complements rather than replaces sitemaps: the sitemap remains the full inventory; IndexNow is the change signal. Google does not participate — Googlebot discovery still runs through sitemaps, internal links, and crawl scheduling.

For large catalogs, IndexNow is also a crawl-efficiency tool: engines that know exactly which URLs changed spend less of a site's crawl budget re-fetching pages that didn't.

Related terms

  • Crawl Budget IndexNow reduces wasted recrawling.
  • AI Crawler faster indexation feeds AI retrieval sooner.

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