Google Gemini and Search

Google Gemini is Google’s family of AI models and the name of its standalone AI assistant app. Gemini models also power AI features inside Google Search, such as AI Overviews and AI Mode, so they increasingly shape how search results are summarised and which sources get cited.

Written by Paul Hoda, SEO consultant since 2005. Last updated 8 November 2026.

What Gemini is

Gemini is a set of large language models built by Google. They are multimodal, which means they can work with text, images, audio and video. Google launched Gemini in December 2023 and renamed its Bard chatbot to Gemini in early 2024. The name now covers several things:

  • The Gemini models: the underlying AI, offered in different sizes.
  • The Gemini app: a chat assistant on the web, Android and iOS.
  • Gemini in Google products: features in Gmail, Docs, Android and Search.

How Gemini connects to Google Search

Google has said that AI Overviews and Google AI Mode use customised Gemini models working together with its search systems. The model reads content from pages in Google’s index and writes a summary with links to sources. AI Mode goes further, using a technique Google calls query fan-out to run many related searches before answering.

The Gemini app can also search the web to ground its answers, and it often shows source links. However, the app is a separate product from Google Search, and its answers can differ from what appears in AI Overviews.

What this means for SEO

Because AI features in Search draw on the same index, the fundamentals still decide whether you can appear:

  1. Your pages must be crawlable by Googlebot and indexed.
  2. Content should be helpful, accurate and written for people, in line with Google’s guidance on helpful content.
  3. Clear structure helps: direct answers, descriptive headings, lists and tables.
  4. Signals of experience and trust, such as authorship and sources, support credibility.

Google has said there are no special optimisations required to appear in AI Overviews or AI Mode beyond normal SEO best practice, and that a page must be indexed and eligible to show a snippet.

Controls for site owners

  • Google-Extended: a robots.txt token that controls whether content is used to train Gemini models and to ground the Gemini app. Google says it does not affect Search. See Google-Extended.
  • Snippet controls: nosnippet, max-snippet and data-nosnippet limit how much text Search features, including AI Overviews, can show.

How to measure Gemini-driven visibility

Google Search Console includes AI Overview and AI Mode traffic within its overall web search performance data rather than in a separate report. To understand your presence, check key queries manually, note which sources are cited, and watch for changes in clicks against impressions. For the Gemini app, test important questions periodically and look for gemini.google.com in your referral data.

For a practical walkthrough, see how to rank in ChatGPT with AI SEO.

Key Takeaways

  • Gemini is both Google’s family of AI models and its standalone assistant app.
  • Customised Gemini models power AI Overviews and AI Mode in Google Search.
  • Google says no special optimisation is needed beyond normal SEO best practice.
  • Google-Extended controls Gemini training and app grounding, not Search.
  • Search Console reports AI feature traffic within overall web search data.

Related Terms

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