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Google-Extended

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Google-Extended is a robots.txt product token that controls whether content Google crawls may be used to train future Gemini models and for grounding in Gemini Apps and Vertex AI. It has no separate user agent, and Google says it “does not impact a site’s inclusion in Google Search nor is it used as a ranking signal.” It does not opt you out of AI Overviews.

What does Google-Extended control?

Use for training future Gemini models and for grounding in Gemini Apps and Grounding with Google Search on Vertex AI. Crawling uses existing Google user agents; the token is only a control.[1]

Does it affect AI Overviews?

No. AI Overviews and AI Mode are Search features; controls are snippet rules and noindex.[2]

How do you use it?

User-agent: Google-Extended
Disallow: /

See robots.txt for AI crawlers.

Frequently asked questions

Does blocking Google-Extended hurt rankings?

Google says it is not a ranking signal.

Is Google-Extended a crawler?

No; it is a token, not a separate user agent.

Will blocking it remove me from Gemini answers?

It affects grounding in Gemini Apps; check Google’s current documentation.

References

Sources accessed October 14, 2026 unless another date is given. See all sources.

  1. “List of Google's common crawlers (Googlebot, Google-Extended)”. Google for Developers. accessed October 14, 2026.
  2. “AI features and your website”. Google Search Central. accessed October 14, 2026.
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