Google AI Overviews

What it is

AI Overviews appear on some Google Search results pages and summarise an answer with links to pages that support it. AI Mode is a separate, conversational experience aimed at queries that need exploration or comparison. Google notes the two may use different models and techniques, so their answers and links vary.

AI Overviews are shown only when Google’s systems decide they add something beyond classic Search, and so “often don’t trigger”.

Officially documented · Google Search Central

How answers are assembled

Google describes two techniques. Retrieval-augmented generation grounds answers in pages retrieved by its core ranking systems. Query fan-out issues several related sub-queries across subtopics and data sources to find additional supporting pages.

Officially documented · Optimizing your website for generative AI features on Google Search · AI features and your website

Google also warns against creating separate pages for every fan-out variation mainly to manipulate rankings or AI responses. That violates its scaled content abuse policy.

Eligibility

To be eligible as a supporting link, a page must be indexed and eligible to be shown in Google Search with a snippet. There are no additional technical requirements, and no special schema.org markup or AI text files are required.

Officially documented · Google Search Central

Google’s later AI optimization guide adds a site-level condition: a site “must be included in Search generative AI features in Search Console” to be eligible.

Officially documented · Google Search Central

Sites are included by default; the setting is the Search generative AI control (Search generative AI control). The older AI features page does not mention this condition.

Measurement

Clicks and impressions from AI features are included in Search Console’s Performance report under the “Web” search type. Since August 31, 2026, the Generative AI performance report also shows AI Overviews and AI Mode impressions on their own. See Generative AI performance report: AI Overviews and AI Mode in Search Console.

Controls

• Crawling for Search, including AI features, is governed by robots.txt rules for Googlebot — see robots.txt.
• To limit what is shown from a page, use nosnippet, data-nosnippet, max-snippet or noindex — see Snippet controls for AI Overviews and AI Mode.
• To exclude a whole site from AI Overviews and AI Mode while staying in classic results, use the Search generative AI control in Search Console — see Search generative AI control.
• Google-Extended controls AI training and Gemini grounding, not inclusion in Search — see Google-Extended.

Not established

• How Google selects which supporting links to show, or in what order.
• Whether structured data, page length or answer formatting change inclusion. Google’s documentation says structured data must match visible text. It does not say it increases inclusion.