How is AI search different from a normal Google search?

A normal search gives you a ranked list of links to open and compare yourself. AI search reads several of those sources for you and writes one answer, usually with citations. Google now does both: the familiar links, plus AI Overviews at the top and a separate AI Mode, so the line between the two is blurring.

How does AI search work behind the scenes?

The service interprets your question, may split it into several searches, and queries a web index such as Google's or Bing's. It fetches the most relevant pages, pulls out the passages that answer the question, and a language model writes a summary from them. Most services then show the pages they used as numbered sources or links.

Is ChatGPT a search engine now?

Not in the traditional sense, but it can behave like one. When a question needs current information, ChatGPT searches the web and shows its sources. OpenAI uses a dedicated crawler for this, OAI-SearchBot, separate from GPTBot, which collects training data. For many people ChatGPT has become a first stop before, or instead of, Google.

Which AI search engines are most used in the UK?

Google is still dominant, with around 91% of UK searches according to StatCounter for September 2026, which means AI Overviews reach most searchers. Beyond Google, the main AI search tools are ChatGPT, Microsoft Copilot (built into Windows and Edge), Perplexity and Gemini. Usage shifts quickly, so we check which services your own buyers use.

Is AI search free to use?

Mostly, yes. Google's AI Overviews and AI Mode are free, and ChatGPT, Perplexity, Copilot and Gemini all have free tiers. Paid plans typically add more searches, newer models, longer answers and features like file uploads. For a business, the more important point is that your buyers can use AI search at no cost.

How do I get better results from AI search?

Ask a full question with the details that matter, such as location, budget and what you've already tried. Ask follow-ups rather than starting again, and open the cited sources for anything important. If the answer seems off, rephrase or try a second service: comparing two answers is a quick way to spot errors.

Which AI search tool is the best?

It depends on the job. Google's AI features are right there in normal searches, Perplexity is strong on clear, numbered sources, and ChatGPT is good at follow-ups and explaining things step by step. Copilot suits people who already work in Microsoft 365. Many people use two or three, depending on the question.

Can you search with voice or images in AI search?

Yes. Most AI search services let you speak a question or upload a photo, for example to identify a plant, translate a sign or get help with something broken. For businesses, that makes clear product photos and descriptive alt text more useful than they used to be.

Does AI search work equally well in every language?

The major services answer well in English and most European languages, but the pool of sources varies. English questions draw on a huge range of pages, so competition to be cited is tough. Smaller languages, and very local UK questions, rely on fewer sources, which can make it easier for a well-documented business to be named.

What is an answer engine?

An answer engine is a search service that replies with a finished answer rather than a list of links. Perplexity was built as one from the start, and ChatGPT search, Google's AI Mode and Copilot work in a similar way. Optimising content for them is often called answer engine optimisation, or AEO.

Is AI search optimisation different from SEO?

It builds on SEO rather than replacing it. Google says there are no extra requirements for its AI features beyond normal SEO best practice, and many AI tools find their sources through search indexes. The difference is emphasis: AI search optimisation puts more weight on direct answers, consistent facts and being mentioned by other trusted sites.

What is AI search visibility?

AI search visibility is how often, and how accurately, a business appears in answers from AI search tools for the questions its customers ask. It's measured in mentions, citations and the accuracy of what's said, rather than rankings. We cover it in more depth on our AI visibility page, including how it's tracked month to month.

Where does AI search get its information from?

From two places. First, what the model learned during training, which can be months or years old. Second, pages it fetches from the web or a search index when you ask. The fetched pages are usually the ones shown as sources, and they're the part a business can influence most directly through its own site and listings.

Can I trust the answers AI search gives me?

Often, but not blindly. AI can misread a source, mix up details from different pages or present an old figure as current. For anything involving health, legal matters or money, open the cited sources and check them. For UK rules, go to the primary source, such as GOV.UK or the relevant regulator.

Why do two people get different AI answers to the same question?

Each answer is generated fresh, and the service may fetch different sources depending on timing, wording, location, account history and which model version is running. Small changes in phrasing can change which businesses are named. That's why AI visibility is measured by asking the same questions several times and looking at the share of answers, not a single run.

How up to date are AI search answers?

When the service searches the web, an answer can draw on pages published that day, as long as they've been crawled. Answers based only on the model's training data can be months old. If an answer shows no sources, assume it may be out of date, and check anything time-sensitive such as prices, opening hours or regulations.

What does RAG mean in AI search?

RAG stands for retrieval-augmented generation. Instead of relying only on what it learned in training, the AI first retrieves relevant documents, then writes its answer from them. That makes answers more current and easier to check, and it's why pages that answer a question clearly and directly have a better chance of being used.

Do AI search tools store what I search for?

Usually, depending on the service and your settings. Most let you turn off history or opt out of your conversations being used to train models. Under UK GDPR you have rights over your personal data, and the ICO has published guidance on AI and data protection. As a rule, don't enter sensitive personal or client details into a tool you don't trust.

Why does AI search show sources at all?

So you can check the details and read further. Sources also make the answer more transparent about where claims come from. For businesses, the cited sources are where the clicks go: when someone wants more than the summary, they open one of the linked pages, so being a cited source is worth more than a passing mention.

What are Google AI Overviews?

AI Overviews are AI-written summaries that appear at the top of Google's results for some searches, with links to the pages they draw on. They launched in the UK on 15 August 2024. They don't show for every query: Google tends to use them for questions where a summary of several sources is useful.

What is Google AI Mode?

AI Mode is a separate search experience in Google, rolled out in the UK in July 2025, where you can ask longer, more complex questions and follow up in a conversation. It searches many sources at once and replies with an AI-written answer plus links. You reach it from a tab on the results page or the Google app.

Can I turn off AI Overviews in Google?

There's no setting to switch them off completely. If you only want traditional links, choose the Web filter under the search box, which shows a plain list of results. For publishers it's a different question: since June 2026 the CMA's conduct requirement lets publishers opt out of their content being used to power Google's AI features.

Do AI Overviews reduce clicks to websites?

They can. An AI Overview takes space at the top of the page and often answers the question outright, so the links below may get fewer clicks even if their ranking doesn't change. The pages cited inside the Overview are the exception, since they get the most visible links. That's why being a cited source matters.

Will AI search replace Google?

Not soon. Google still handles around nine in ten UK searches, and traditional results remain strong for navigation, shopping and local searches. But Google itself is becoming an AI search engine, with AI Overviews and AI Mode, and a growing share of questions now gets an AI answer first. The safest plan is to be visible in both.

What are zero-click searches?

Zero-click searches are searches that end without the user clicking through to any website, because the answer is already on the results page. Featured snippets, knowledge panels, maps and weather boxes started the trend, and AI Overviews and AI answers have made it more common because they summarise the whole answer in one place.

Why are zero-click searches increasing?

Because search engines and AI tools keep answering more questions directly. When Google shows an AI Overview or ChatGPT writes a full reply, many people get what they need without visiting a site. Simple factual questions are most affected; complex purchases still tend to involve clicks, but often fewer of them, and later in the journey.

Are zero-click searches bad for my business?

Not necessarily. You may get fewer visits for basic questions, but not fewer customers. If your business is named in the answer, buyers still see you, and the people who click through are usually further along and more likely to get in touch. The risk is being absent from the answer, not the lack of a click.

How can I spot zero-click searches in my data?

Look in Google Search Console for queries where impressions are rising while clicks stay flat or fall, and click-through rate drops even though your average position holds. That pattern suggests more people are getting their answer on the results page. Comparing it with branded search volume shows whether visibility is turning into demand.

How do you optimise for zero-click searches?

Aim to be the source the answer is built on. Put a short, direct answer at the top of each relevant page, make sure your name, services and prices are consistent across the web, and earn mentions on sites AI trusts. Then measure mentions and citations, not just clicks, so you can see the visibility you're getting.

How does AI search affect UK businesses?

Visibility moves from the list of links into the answer itself. Businesses that are named and cited gain trust and enquiries before a buyer ever visits their site, while those left out become invisible at that moment, even if they rank well. Local services, B2B suppliers and online shops are all affected, because buyers in each ask AI for shortlists.

Should small businesses care about AI search?

Yes, especially if customers research before they buy. AI tools often recommend businesses for local and niche questions, where few competitors have clear, consistent information online. A small firm with a well-structured website, an accurate Google Business Profile and genuine reviews can be named ahead of much larger competitors.

How can I check if my business appears in AI search?

Write down five to ten questions your customers would ask, then put them to ChatGPT, Google, Perplexity and Copilot and note who gets named. Repeat each question a few times, as answers vary. Our free AI check does this for you and shows what's said about your business and which sources the answers rely on.

What's the difference between AI search optimisation, AEO and GEO?

They overlap almost entirely. AI search optimisation is the plain-English description. AEO, answer engine optimisation, grew out of featured snippets and voice search and focuses on becoming the cited answer. GEO, generative engine optimisation, comes from academic research on AI-generated answers. In practice, the methods are nearly the same.

What does AI search optimisation involve in practice?

Mapping the questions buyers ask AI, checking who is named today, and then fixing what's missing: pages with direct answers, structured data, consistent facts on your site and listings, mentions on trusted sites, and making sure AI crawlers can read your site. Research on generative engines found that adding citations and statistics can raise visibility by 30–40%.

Do I still need SEO if people use AI search?

Yes. Google still handles most UK searches, and many AI tools find their sources through search indexes, so a site that ranks well in traditional search finds it easier to be cited by AI. Google says its AI features use the same SEO fundamentals. AI search optimisation is best seen as an extension of SEO, not a replacement.

Can businesses advertise in AI search?

Advertising in AI search is still at an early stage, and where ad formats do appear they are labelled separately from the answer. Most of what appears in AI answers can't be bought: it depends on what the model finds and trusts about you. For most businesses, earning organic mentions and citations is the more reliable route for now.

Guide · AI visibility

AI search optimisation: how AI search works

Q: What is AI search optimisation?

AI search optimisation is the work of making your business easy for AI search tools such as ChatGPT, Google's AI Overviews and Perplexity to find, understand and cite. It covers clear pages that answer buyers' questions directly, consistent facts across the web, structured data, mentions on trusted sites and a website AI crawlers can actually read.

AI search gives you a written answer instead of a list of links, and AI search optimisation is the work of getting your business into that answer. This guide explains how AI search works, which services UK buyers use, what zero-click searches are and what it all means for businesses.

About 8 minutes to readUpdated October 2026

Short answer

What is AI search optimisation?

AI search optimisation is making your business easy for AI search tools to find, understand and cite. AI search itself is search where a model reads several sources and writes one summarised answer, often with links. Examples are ChatGPT search, Google's AI Overviews and AI Mode, Perplexity, Copilot and Gemini.

People ask the way they talkFull sentences instead of a few keywords.
The AI does the readingIt fetches and compares several sources in seconds.
One finished answerUsually with citations, often with no need to click further.

How AI search works

How AI search works: from ten blue links to one answer

Scroll through to see what happens when someone searches with AI, step by step.

Fig. 01 · How it used to look
Before: ten blue links
A traditional search returns a list of links and ads. You type a few keywords, open several pages and piece the answer together yourself.
Fig. 02 · The question
Now: you ask a full question
With AI search you type or say the question as you'd ask a person, including the details that matter to you.
Fig. 03 · The sources
The AI searches and reads
The service searches the web or its own index, fetches the pages that look most relevant and reads the parts that answer the question.
Fig. 04 · The answer
An answer is written, with sources
The model weighs the sources against each other and writes a summary. It often shows where each detail came from, as numbered citations.
Fig. 05 · Zero click
Many never click through
When the answer is enough, the search ends there: a zero-click search. People who do click usually go to one of the sources named in the answer.
Fig. 06 · What it means
Visibility moves into the answer
For businesses, ranking among the links is no longer the whole story. What counts is being named and cited in the answer itself.

Fig. 01 · How it used to look01 / 06

e-bike commuting london

About 1,230,000 results

Which e-bike suits a 10-mile year-round commute in London?

1calmwaycycles.co.ukE-bikes for winter commutingYour business
2Buyer's guideHow to choose a battery
3ForumCommuting through the winter
4ReviewMid-drive or hub motor?

Reading sources …

For 10 miles a day all year, an e-bike with a mid-drive motor, at least a 500 Wh battery and full mudguards works well. Calmway Cycles in Hackney stands out for winter servicing and test rides.¹²⁴

The answer was enoughClick1

The example and the business are fictional.

Comparison

AI search vs traditional search

	Traditional search	AI search
How you ask	A few keywords	A full question, often with follow-ups
What you get	A list of links	A written answer with sources
Clicks	You click through yourself	Often no click at all
Who compares	You	The AI, for you
Ads	Top and bottom of the page	Fewer, but arriving

Traditional search isn't going away. Most people switch between both depending on the question.

The AI search services

AI search engines UK buyers use

They work in similar ways but differ in where they find sources and how they show them.

ChatGPT
Searches the web when a question needs current information and shows its sources as links in the answer.
Google AI Overviews
An AI-written summary at the top of Google results, live in the UK since August 2024, with links to sources.
Google AI Mode
A separate Google mode for longer questions and follow-ups, launched in the UK in July 2025.
Perplexity
Built as an answer engine from day one, with numbered sources in every answer.
Microsoft Copilot
Microsoft's AI assistant, built on Bing's index and available in Windows, Edge and Microsoft 365.
Gemini
Google's AI assistant, which can use Google Search to answer questions about current events.

Zero click

Zero-click searches: when the answer is enough

A zero-click search ends without anyone clicking through to a website. It started with featured snippets and quick answers in Google, and it's becoming more common now that AI search writes the whole answer on the results page.

Visibility without visitsYour name can appear in the answer even when nobody clicks.
Fewer, warmer clicksPeople who do click through have often compared and decided already.
New ways to measureClicks alone no longer tell the story. Mentions in answers matter just as much.

For businesses

AI search optimisation: what changes for businesses?

Four things that shift as more of your buyers search with AI.

01
Being named is the new ranking
Appearing among the links isn't enough. You need to be one of the sources the AI chooses to quote.
02
Consistent facts everywhere
AI blends details from many sites. If they don't match, the answer about you can be wrong.
03
Other voices count
Reviews, trade sites and press mentions shape which businesses the AI trusts.
04
Measurement changes
Beyond clicks, you need to track how often you're named, and described correctly, in answers.

Read onWhat is AI visibility?Answer engine optimisation (AEO)See how you appear with the free AI check

Glossary

AI search glossary

AI search: Search where an AI model reads sources and writes its own answer.
Answer engine: A service that gives a finished answer instead of a list of links.
AI Overviews: Google's AI-written summary at the top of the search results.
AI Mode: Google's conversational search mode for longer questions and follow-ups.
Large language model (LLM): The AI model that interprets the question and writes the answer.
Citation: When an answer shows which source a detail came from, usually with a link.
Zero-click search: A search that ends without a click through to any website.
RAG: Retrieval-augmented generation: the AI fetches sources first, then writes its answer from them.
GEO: Generative engine optimisation: the work of appearing in AI-generated answers.
AEO: Answer engine optimisation: shaping content so it becomes the answer that gets cited.

Next step

How does your business appear in AI search?

The free AI check shows whether you're named when customers ask AI, and what's said about you.

Try the free AI check Read about AI visibility

From the blog

AI search optimisation: how AI search works

What is AI search optimisation?

How AI search works: from ten blue links to one answer

Before: ten blue links

Now: you ask a full question

The AI searches and reads

An answer is written, with sources

Many never click through

Visibility moves into the answer

AI search vs traditional search

AI search engines UK buyers use

ChatGPT

Google AI Overviews

Google AI Mode

Perplexity

Microsoft Copilot

Gemini

Zero-click searches: when the answer is enough

AI search optimisation: what changes for businesses?

Being named is the new ranking

Consistent facts everywhere

Other voices count

Measurement changes

AI search glossary

How does your business appear in AI search?

More on SEO and AI search

How AI chooses which companies to recommend

How to appear in ChatGPT: 7 reasons you are not mentioned, and what to do

How long does SEO take? Realistic timelines, and is SEO worth it?

What is hreflang? How to show Google the right language version

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