What are Google AI Overviews?

Google AI Overviews are AI-generated summaries that Google Search shows above the classic results for some queries. A Gemini model writes each summary from pages in the Google index and links to the websites that support it. AI Overviews grew out of the SGE experiment and began rolling out to all U.S. users in May 2024.

Why Google AI Overviews matter

Google AI Overviews put a written answer between the searcher and your page. In July 2025, Alphabet reported that AI Overviews had over 2 billion monthly users across more than 200 countries and territories and 40 languages.

What people do next has been measured. Pew Research Center tracked the browsing of 900 U.S. adults in March 2025: 18% of their Google searches produced an AI summary. When one appeared, users clicked a traditional result in 8% of visits, against 15% without one, and clicked a link inside the summary in just 1% of visits. They also ended their browsing session on 26% of pages with a summary, against 16% without.

For a brand, the summary is often the whole visit: a zero-click search. Being cited in it, or named by it, now matters as much as the blue link underneath.

How Google AI Overviews work

Based on Google's documentation, an AI Overview comes together in four steps:

Decide whether to show one. AI Overviews "are only shown when our systems determine that it is additive to classic Search, and as such, often don't trigger." Longer questions trigger them more often.
Retrieve pages. The model relies on Google's core ranking systems to fetch pages from the Search index, a technique Google calls retrieval-augmented generation, or grounding. It may also use query fan-out, "issuing multiple related searches across subtopics and data sources."
Write and link. A Gemini model writes the summary and shows links to the supporting pages.
Hand off to a conversation. Since January 2026, a follow-up question asked from an AI Overview continues as a conversation in Google AI Mode.

Eligibility is plain SEO. To appear as a supporting link, "a page must be indexed and eligible to be shown in Google Search with a snippet." Google lists no additional technical requirements and no special markup.

From SGE to AI Overviews

AI Overviews began as an experiment. On May 10, 2023, Google opened SGE (Search Generative Experience) in Search Labs, in English, for U.S. users of Chrome desktop and the Google app. SGE placed "an AI-powered snapshot of key information" above the results, with suggested follow-up questions that opened a "conversational mode."

On May 14, 2024, Google began rolling the feature out to everyone in the U.S. under a new name, AI Overviews, noting that people had "already used AI Overviews billions of times through our experiment in Search Labs." The conversational side that SGE tested now lives mostly in AI Mode, which launched in Labs in March 2025. In May 2026, Google joined the two into a single flow: an AI Overview on the results page, then a follow-up in AI Mode.

Example: which query gets an AI Overview?

Two homeowners research the same purchase on Google.

The first types heat pump. Short searches rarely get a summary: in Pew's data, only 8% of one- or two-word searches produced one. The page looks much as it always did.
The second types is a heat pump worth it in an old house with radiators in a cold climate. Searches of 10 words or more produced a summary 53% of the time. Google may fan this one out into sub-searches on radiator sizing, running costs in winter and installation prices (illustrative), then write a short answer that links to a few of the pages it retrieved.

The second homeowner may never scroll. An installer cited in the summary gets seen; one ranking fifth for the head term, but not cited, may not.

AI Overviews vs AI Mode

	AI Overviews	AI Mode
Where it appears	Above the classic results	In its own tab, or after a follow-up
Who triggers it	Google, only when it judges it useful	The user, by choosing AI Mode or asking a follow-up
Format	A short summary with links	A longer answer and a conversation
Tracked by Hawkscan	No	Yes

Google warns that "AI Mode and AI Overviews may use different models and techniques, so the set of responses and links they show will vary."

How to track and improve your presence in AI Overviews

Keep doing SEO. Google says there are no additional requirements to appear in AI Overviews, nor other special optimizations necessary. Pages that rank for the sub-questions behind a query are the ones it can cite.
Use the right controls. To limit what Google shows from a page, use nosnippet, data-nosnippet, max-snippet or noindex. Blocking Google-Extended does not remove a site from AI Overviews: Google says that token "does not impact a site's inclusion in Google Search."
Read Search Console. Clicks and impressions from AI Overviews are counted in the Performance report, under the "Web" search type.
Know what your tool covers. Hawkscan does not track AI Overviews. It tracks Google AI Mode, where AI Overview follow-ups now continue, with ChatGPT, Gemini and Microsoft Copilot, and shows the full answers each engine gives to the prompts you follow.

Common questions

Can a website opt out of AI Overviews?

Not separately. Google treats AI as part of Search, so the controls are the same as for regular results: nosnippet, data-nosnippet, max-snippet or noindex limit what can be shown, and robots.txt rules for Googlebot limit crawling. Each one also affects how the page appears in classic results.

Do you need to rank in the top 10 to be cited in AI Overviews?

No. In a study of 863,000 keyword searches, Ahrefs found that only 37.9% of URLs cited in AI Overviews also ranked in the top 10 for the query. The rest came from positions 11 to 100 (31.2%) or beyond (31.0%). Ahrefs attributes the gap to query fan-out.

Are AI Overviews the same as featured snippets?

No. A featured snippet quotes a passage from one page. An AI Overview is written by a model from several pages: in Pew's March 2025 data, 88% of AI summaries cited three or more sources, and only 1% cited a single one.