Google AI Overviews and AI Mode

What the two features are

On Google’s AI features documentation, updated 10 December 2025, AI Overviews are described as a way to get the gist of a complicated question, with links as the way to go further. They are designed for queries where Google thinks the overview adds something the classic results did not. They often do not trigger. AI Mode is described as the place for questions that need more exploration, comparison, or reasoning, again with links to supporting pages.

The July 2026 optimization guide names the machinery. Retrieval-augmented generation, which Google also calls grounding, pulls pages from the Search index and uses those pages to build the answer, then shows links. Query fan-out issues related searches while the answer is being built, so the set of supporting links can be wider than a single classic results page. AI Overviews and AI Mode may use different models, so they do not show the same links.

The practical consequence is dull and useful. If Google has not indexed the page, the page is not in the pile those features draw from. There is no side door.

What makes a page eligible

Google’s technical requirement, stated on both pages above, is that the URL is indexed and eligible to be shown in Google Search with a snippet. Crawling has to be allowed in robots.txt and at the host or CDN. The important content has to be text. Internal links have to make the URL findable. Structured data, if you use it, has to match the visible text. There are no additional technical requirements for the AI features.

The July 2026 guide adds a control that the December 2025 page did not have. A site must be included in Search’s generative AI features in Search Console to be eligible to appear in them. Google’s post of 3 June 2026, updated 31 August 2026, says a Search Console control for those features had rolled out to all websites worldwide. Sites that opt out do not get traffic or impressions from the generative AI features. Google says that opt-out is not a ranking signal for the classic results.

Meeting the requirements does not mean the page will be crawled, indexed, or shown. Google says so in both documents. DiscoSEO does not guarantee rankings or citations either.

What does not control these features

Google-Extended does not. On the common crawlers page, updated 14 July 2026, Google-Extended is a robots.txt token, not a separate crawler. It manages whether content Google has crawled may be used to train future Gemini models, and for grounding in Gemini Apps and in Vertex AI. Google says it does not affect inclusion in Google Search and is not a ranking signal. Blocking it does not remove a page from AI Overviews. The Search controls are Googlebot, plus nosnippet, data-nosnippet, max-snippet, and noindex.

An llms.txt file does not. The July 2026 guide says Google Search does not use llms.txt or other special AI text files. Keeping the file is fine for other systems. For Google, it neither helps nor hurts. The format, and the reason we still publish one, is What is llms.txt?.

A special schema.org type does not. Google says structured data is not required for generative AI search and that there is no special markup to add. Keep using the types that match visible content if you want rich-result eligibility for the classic results. That is a different feature.

How to limit what Google shows

The AI features page says robots.txt rules for Googlebot control crawling for Search, because the AI features are part of Search. To limit what text is shown, use the snippet controls or noindex. nosnippet also keeps the content from being used as a direct input for AI Overviews and AI Mode. Those controls shorten or remove the ordinary snippet too. Use them when that is the intended result, not as a casual experiment.

If a control is in place and the text still appears, Google’s troubleshooting list is short. Confirm the directive is in the HTML Googlebot received, using URL Inspection. Then wait. Recrawl can take days or months. You can request recrawl. There is no faster official switch.

What Google has said about size and clicks

On the 3 June 2026 post, Google wrote that AI Overviews had over 2.5 billion monthly active users, and that AI Mode had surpassed one billion monthly users. The page was updated 31 August 2026. That is Google’s own user count for the products. It is not a count of businesses named, and it is not a click-through rate. The catalog of figures, including this one, is on GEO statistics.

On the AI features page, Google says clicks that come from results pages with AI Overviews are higher quality, by which it means people are more likely to spend more time on the site. Google does not publish a percentage there. Treat it as the company’s description, not as a measurement of your URL.

An independent click comparison is Pew’s. In March 2025, across 68,879 Google searches by 900 U.S. adults, a traditional result was clicked on 8% of visits that showed an AI summary and on 15% of visits that did not. A link inside the summary was clicked on 1% of visits that had one. Pew Research Center, 22 July 2025. Pew’s study and Google’s user counts answer different questions. Neither one says your page will be the link.

How to read your own results

Google says appearances in AI Overviews and AI Mode are included in the Search Console Performance report under the Web search type, and that a Generative AI performance report shows how content is doing in those features. The July 2026 guide is the document that names the report. Use Search Console for Google. Do not trust a vendor that claims to have Google’s internal ranking metrics. Google says no third party has them.

For Chat GPT, Claude, and Perplexity, Search Console is the wrong instrument. Those products are not Google Search. The manual check, and the difference between a check and a monitor, is How to check AI search mentions.