What Are AI Overviews? A Plain-English Guide for UK Business Owners

You search for your own trade, say “how much does a boiler service cost”, from your van in Warrington. The first thing on the page is not your website or a competitor’s. It is a paragraph Google has written itself. And the obvious question follows: is that taking my customers?

So, what are AI overviews? They are AI-generated summaries that Google shows at the top of some search results. Each one is built from pages already in Google’s index and links out to the sources it used.

This guide explains what Google AI Overviews are, how they work, how they differ from AI Mode, when they show up for local searches, the UK timeline, how accurate they are, what they do to your clicks and whether you can turn them off. We lean on Google’s own documentation (Search Central’s “AI features and your website”) wherever we can, and every figure has a date and a source.

What AI Overviews Actually Are (and What They Are Not)

Most people have seen an AI Overview. Far fewer could tell you how it differs from the answer boxes Google has shown for years.

Google AI Overviews are AI-generated summaries shown at the top of some Google search results. They give the gist of a question in a short paragraph or list, written by Google’s generative AI, with links to the web pages that support the answer.

Google describes the purpose in its Search Central documentation: to “help people get to the gist of a complicated topic or question more quickly, and provide a jumping off point to explore links.”

That definition is simple enough. The confusion comes from what people assume they are. Four things AI Overviews are not:

• Not a featured snippet. A featured snippet quotes one page word for word. An AI Overview writes new text from several pages. Pew Research found 88% of AI summaries cited three or more sources, and the median summary was 67 words long (Pew, US data, March 2025).
• Not a separate search engine. To be a supporting link, a page must be “indexed and eligible to be shown in Google Search with a snippet”, according to Google. It is the same index your website already sits in.
• Not optional for searchers. Google’s help page says plainly: “Features cannot be turned off.” There are workarounds, covered in the turn-off section below.
• Not guaranteed to be right. The same help page says AI Overviews “can and will make mistakes.”

One more distinction matters before going further. An AI Overview is a summary that sits on the normal results page. AI Mode is a separate, conversational tab. They are related, but they are not the same thing, as the section after next explains.

How AI Overviews Work and Where the Information Comes From

You type one question. Google may run several searches before it writes a word back.

So, how do AI overviews work? Using Google’s own wording, the process breaks into three steps:

1. Google decides whether an overview is worth showing. According to Google, “AI Overviews are only shown when our systems determine that it is additive to classic Search, and as such, often don’t trigger.” Plenty of searches get none.
2. It fans the question out. Google says AI Overviews and AI Mode “may use a query fan-out technique, issuing multiple related searches across subtopics and data sources, to develop a response.” A question like “is it worth getting a flat roof replaced in winter” could spin off searches about cost, weather, materials and building regulations.
3. It writes the summary and attaches links. The supporting links come from pages already in Google’s index that are eligible to show a snippet. After the launch problems of May 2024, Google said AI Overviews are “built to only show information that is backed up by top web results” (Liz Reid, Google, 30 May 2024).

Which sources actually get used? The best large dataset is American. Pew Research’s study of US users (March 2025 browsing, published 22 July 2025) found Wikipedia, YouTube and Reddit were the most-cited sources, making up 15% of AI summary sources combined.

For local businesses, there is a useful hint in Google’s own guidance. Its list of best practices for AI features includes “checking that your Merchant Center and Business Profile information is up-to-date.” That is about as close as Google gets to saying your Business Profile feeds local answers.

Third-party sites matter too. In a US study of Houston plumber searches (Whitespark, May 2025), roughly 60% of AI Overview citations went to third parties such as Indeed, Reddit, Quora, Yelp and Thumbtack, and around 40% to local businesses themselves.

Why one page gets cited and another does not is a bigger subject: our guide to how AI search citations work covers it in detail.

AI Overviews vs AI Mode: What Is the Difference?

Here is a number that surprises most owners. When Ahrefs compared the two features, it found only 13.7% overlap in the sources they cited, even though their answers were 86% semantically similar. That figure comes from an Ahrefs AEO course video (April 2026), not from Google. Similar answers, built from largely different pages.

Google confirms the two are separate systems: “AI Mode and AI Overviews may use different models and techniques, so the set of responses and links they show will vary.”

The line between them blurred in 2026. At Google I/O on 19 May 2026, Google announced that you can now “ask a follow-up question right from an AI Overview” and “flow into a conversational back and forth with AI Mode”, on desktop and mobile worldwide. In the same announcement, Google said that “just one year after its debut, AI Mode has surpassed one billion monthly users.”

Think about the kind of question each suits. “Emergency dentist St Helens open Saturday” is a quick lookup. A follow-up like “which of those take NHS patients?” is the sort of digging AI Mode is built for. We are not predicting what Google will return for either; the point is that the two features handle different stages of the same search.

The practical takeaway: track AI Overviews and AI Mode separately. Appearing in one does not mean you appear in the other, and a strong Google Maps position does not guarantee either.

When AI Overviews Show Up, Including for Local Searches

You can predict, fairly reliably, whether an AI Overview will appear. The giveaway is how the search is worded, not which trade it is about.

Pew’s US data (March 2025) shows the pattern clearly:

• 18% of Google searches produced an AI summary.
• Only 8% of one- or two-word searches did.
• 53% of searches of ten words or more did.
• 60% of searches starting with who, what, when or why did.

Local searches follow the same logic. Whitespark tested 540 US queries (published 12 May 2025) and split them by type:

Translate that to North West England and the pattern is easy to picture. “Plumber Warrington” is a local search, so expect the map pack. “How long does a boiler service take” is informational, so expect an overview. “How much is a boiler service in Liverpool” is a hybrid question with a place in it, the type most likely of all to get an AI Overview in the US data. Those are our illustrations, not UK percentages.

Location matters less than you might think. Local Falcon’s research (May 2025) found that adding a place name often reduced the chance of an AI Overview, and that proximity counted for less in AI Overview ordering than in map pack ordering.

A clear caveat: we have not found a large UK-specific study, and Google publishes no trigger rate. The most reliable data is what you see when you search your own services, which our guide to appearing in AI Overviews walks you through.

Our recommendation: if your enquiries mostly come from “trade + town” searches, your map pack position and Business Profile still matter most. If customers ask questions before they pick a business, AI Overviews are where they first meet you.

AI Overviews in the UK: A Dated Timeline

AI Overviews have been live in the UK since August 2024. That is longer than most owners realise, and the feature has changed a great deal since.

One note on that 2 billion figure. AI Overviews are switched on by default, so “users” means people who were shown one, not people who chose to use it.

Features also vary by country, language, account and rollout stage, so what you see on your phone may not match what a customer sees on theirs.

How Accurate Are AI Overviews?

Imagine a regular customer telling you Google says you are closing down. That happened to Anna Mae’s Bakery in Ontario, Canada, in July 2026. An AI Overview said the bakery would close on 31 July because Google had confused it with an Illinois bakery of the same name (PinMeTo). It is a Canadian case, and we are not aware of a documented UK equivalent, but nothing about the mechanism is unique to Canada.

Errors have been part of the story since launch. In May 2024, AI Overviews suggested adding glue to pizza (from a joke forum post) and eating rocks (from a satire site). On 30 May 2024, Google’s Liz Reid blamed “data voids”, cut back satire and user-generated content, restricted when overviews trigger, and claimed a content policy violation on “less than one in every 7 million unique queries.”

Two years on, Google’s help page still says AI responses “can and will make mistakes.” Responding to the bakery case, a Google spokesperson said “issues can arise when there is an absence of high quality information on the web.”

For local businesses, the risky errors cluster in a few places: opening hours, open or closed status, phone numbers, businesses with the same name, and stale directory listings feeding the wrong signal (Hoodline, July 2026).

If an AI Overview gets your business wrong:

1. Screenshot it, noting the date and the exact search you typed.
2. Use the thumbs-down or “Report a problem” link on the overview.
3. Check your Google Business Profile hours, address, phone number and status.
4. Fix conflicting directory listings and anything out of date on your own website.
5. Re-check after Google has recrawled. There is no guaranteed timescale.

The verdict: you cannot edit the answer, only the sources it reads. Keeping those sources accurate is ongoing work, and it is part of what we do in Google Business Profile management.

What AI Overviews Mean for Your Clicks (and How to See It)

When an AI summary appeared, people clicked a traditional result on 8% of visits, compared with 15% when there was no summary. They clicked a link inside the summary just 1% of the time. Those figures come from Pew’s study of US users (March 2025 browsing data, published 22 July 2025).

Ahrefs found a similar direction. Its study published on 4 February 2026 (300,000 keywords, desktop data, December 2023 vs December 2025) found that AI Overview presence correlated with a 58% lower average click-through rate for the top-ranking page. Its April 2025 study had put the drop at 34.5%. Bear in mind this is correlation, desktop only, and from a tool vendor (Ahrefs).

Google’s counter-claim, from Search Central, is that clicks from pages with AI Overviews are “higher quality”, meaning people spend more time on the site. Google has not published figures to back that up.

You can now check the effect on your own site. Search Console counts AI Overview and AI Mode appearances inside Performance, under the “Web” search type. Google also announced a dedicated generative AI performance report on 3 June 2026, showing impressions by page, country, device and date. It started with a subset of sites and reached all sites on 31 August 2026. The launch post lists impressions, not clicks.

If you are seeing impressions rise while clicks fall, our guide to impressions up, clicks down explains how to diagnose it properly.

Worry most if your leads depend on informational content: blog posts, cost guides, how-to pages. Worry least if most enquiries arrive through the map pack and phone calls.

Can You Turn Off AI Overviews?

Can you turn off AI Overviews? Not officially. Google’s help page says: “Features cannot be turned off.” You can, however, get around them.

As a searcher:

• Search as normal, then tap the “Web” filter for text links without AI Overviews.
• Add &udm=14 to the end of the results URL.
• Set a custom search engine using udm=14 in Chrome or Edge (9to5Google).

Google could change any of these at any time.

As a site owner, Google’s controls are nosnippet, data-nosnippet, max-snippet and noindex. The catch is that they also limit how you appear in normal results, and Google says recrawling can take “several days to several months” if you change your mind. For a local business that usually costs more than it saves. Blocking Google-Extended does not remove you from AI Overviews either; it covers other Google systems, not Search.

A UK-specific change is coming. On 3 June 2026 the CMA required Google to give publishers an effective way to keep their content out of AI features such as AI Overviews while staying in classic results, with clear attribution links. Google said the page-level controls need about nine months to build. Check the CMA page for the current status before acting on it.

For most local businesses, the better question is not how to opt out but how to be cited accurately, because a customer who sees your practice named in an overview is still a customer.

Getting Your Business Into AI Overviews

Google is unusually direct on this: “There are no additional requirements to appear in AI Overviews or AI Mode, nor other special optimizations necessary.” It also says you do not need special schema markup or “AI text files.” If someone is selling you an “AI file” to get into AI Overviews, Google’s own documentation says you do not need one.

What works is ordinary, well-executed SEO plus accurate business information. One of our clients, an anonymised veterinary practice in Manchester, went from 6 to 165 Google AI Overview appearances between August 2025 and August 2026 (tracked in Semrush). The details are in our case studies.

For the step-by-step process, read our guide on how to appear in Google AI Overviews. To see how this fits into wider AI search visibility, read what is GEO. If you would rather have it done for you, see our Google AI Overviews service.

FAQ

Are Google AI Overviews available in the UK?

Yes. AI Overviews began rolling out in the UK in mid-August 2024, and AI Mode followed on 28 July 2025. Since May 2026, a follow-up question asked from an AI Overview continues in AI Mode. See the dated timeline above for the full UK history.

Are AI Overviews the same as Gemini or ChatGPT?

No. AI Overviews live inside Google Search and draw on Google’s index of web pages. The Gemini app is a separate Google product. ChatGPT is made by a different company, OpenAI, and has its own search features and sources, so appearing in one does not mean appearing in the others.

Why do I see an AI Overview for some searches and not others?

Google says it shows them only when its systems judge they add something to classic Search. Longer, question-style searches trigger them far more often: in Pew’s US data (2025), 53% of ten-plus-word searches got one, against 8% of one- or two-word searches. See the local searches section above for how this plays out for local queries.

Do AI Overviews use my Google Business Profile?

Google does not spell it out. But its guidance on AI features tells site owners to keep Business Profile information up to date, which is a strong hint. Keeping your hours, phone number and status accurate is the sensible move either way.

Can I see if my website appears in AI Overviews?

Yes. Search Console’s generative AI performance report, available to all sites since 31 August 2026, shows impressions by page, country, device and date. The launch post does not mention clicks or query data. If you would like help reading yours, get in touch or call 07932 237512.