Google-Extended · robots.txt token for Gemini’s use of content
Google-Extended is a robots.txt token that lets a publisher state whether content crawled by Google may be used to train future Gemini models and for grounding in the Gemini app and on Vertex AI. It has no effect on indexing or ranking in Google Search.
Standalone definition · 45 words
What Google-Extended controls according to Google’s documentation
According to Google’s list of common crawlers, Google-Extended controls two uses: training future generations of Gemini models (Gemini apps and Vertex AI API) and grounding, meaning providing content from Google’s index to the model at prompt time, in Gemini apps and Grounding with Google Search on Vertex AI.
What Google-Extended does not block
Google states that Google-Extended does not affect a site’s inclusion in Google Search and is not a ranking signal. It is not a separate bot: crawling is still done by the usual crawlers, Google-Extended is a standalone product token. It therefore does not remove your pages from AI Overviews or AI Mode, which are part of Search.
Example Google-Extended rule in robots.txt
To opt out the whole site: User-agent: Google-Extended then Disallow: /. For AI features in Search, Google points to other controls, see Search generative AI control.
Frequently asked questions about Google-Extended
Does blocking Google-Extended hurt my SEO?
No. Google says this token is not used as a ranking signal in Google Search.
Does Google-Extended show up in my logs?
No, it is not a user agent that visits pages. It is a token read in robots.txt.
Terms related to Google-Extended
Further reading on Google-Extended
- Google’s GEO checklist: how to optimize your site for AI agents
- Search Central Live Paris 2026 recap
- ← Back to the GEO glossary (126 terms)