An AI Overview is the summary Google writes with its Gemini AI models and places at the top of some search results pages. Instead of only listing links, Google answers the query in a few paragraphs or bullet points and shows links to the web pages it drew on. Google launched AI Overviews in the United States in May 2024, after testing the idea as the Search Generative Experience (SGE).
How Google builds an AI Overview
For queries where Google judges a summary helpful, often longer or multi-part questions, it retrieves relevant pages from its normal search index and has a model write a combined answer. Source links appear beside or within the text. Google has said that to be eligible as a supporting link, a page only needs to be indexed and eligible to show a snippet in regular search; there is no separate submission or special markup.
Not every search gets one, and the same query can show an Overview one day and not the next. Site owners can limit what text Google uses with the existing nosnippet and max-snippet controls, though these also affect normal snippets.
An example on a real results page
Someone searches "how often should I service a gas boiler". Instead of ten links first, the results page opens with a short summary covering typical service intervals and safety checks, with links to a manufacturer's guidance page and a heating engineer's blog. The engineer whose clear, specific article was cited gets visibility, even if some searchers never click.
What AI Overviews mean for a small-business site
For simple factual questions, the summary may answer the searcher outright, so informational pages can get fewer clicks. For searches where people need a service, a product or local help, being one of the cited sources puts your name in front of them at the top of the page. In Google Search Console, clicks and impressions from AI Overviews are counted within the normal Web search performance figures rather than reported separately.
The practical response matches generative engine optimization: helpful, specific pages that answer questions clearly, on a site Google can crawl.
Mistakes site owners make
- Blocking snippets to "protect" content. Adding nosnippet removes you from both Overviews and normal snippets.
- Chasing tricks or special markup. Google states no special optimisation is required beyond normal SEO.
- Judging success by clicks alone. Watch impressions and enquiries too, since citations raise awareness.
- Publishing many thin pages hoping to be cited. Scaled, low-value content risks spam penalties.
Related terms
- Featured snippet: the older single-source answer box.
- Generative engine optimization: aiming for citations in AI answers.
- Answer engine optimization: writing content as extractable answers.
- SERP: the results page where Overviews appear.