Glossary
Google-Extended
In short
Google's control token for whether crawled content may train Gemini models and ground Gemini Apps and Vertex AI answers. It does not change Search inclusion or ranking. 16.0 percent of top-10,000 sites refuse it, 12.6 percent by naming it. It has no user-agent string, so it never appears in logs. Example: A Disallow for Google-Extended leaves Googlebot crawling for Search.
Definition
Google's control token for whether crawled content may train Gemini models and ground Gemini Apps and Vertex AI answers. It does not change Search inclusion or ranking.
Sourced example
A Disallow for Google-Extended leaves Googlebot crawling for Search. Source, read 2026-11-04.
How it shows up here
16.0 percent of top-10,000 sites refuse it, 12.6 percent by naming it. It has no user-agent string, so it never appears in logs.
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Sources
Last reviewed 2026-11-04