What Is AI SEO? A Plain-English Guide to AI Search Optimisation

AI SEO, or AI search optimisation, is the work of making a business visible in both traditional search results and the answers AI assistants write. It combines three things: solid SEO foundations so your pages can be found, answer engine optimisation (AEO) so they can be quoted, and generative engine optimisation (GEO) so AI systems recommend your brand accurately. The platforms in question include Google’s AI Overviews and AI Mode, ChatGPT, Gemini, Perplexity, Claude and Microsoft Copilot.

The aim has widened. It used to be enough to rank. Now you also need to be the business an assistant names when someone asks, “Which accountancy software should a 20-person UK firm use?” This guide explains what AI SEO covers, how it works and how to start. If you’d rather hand it over, our AI SEO agency team runs it as one programme.

What does AI SEO mean?

AI SEO is the umbrella term for optimising a business for search in a world where many answers are written by AI. It doesn’t replace SEO. It keeps the SEO foundations and adds two layers on top: answers clear enough for AI systems to lift, and a brand reputation consistent enough for them to recommend.

One quick clarification, because the phrase gets used two ways. You’ll also see “AI SEO” used for AI-powered SEO tools that draft meta descriptions or cluster keywords. That’s useful, but it’s a different thing. In this guide, AI SEO means optimising for AI search, not with AI tools.

Here’s how the related terms fit together:

If you want the detail on either layer, we’ve written separate guides on what GEO is and on answer engine optimisation.

Why does AI search optimisation matter for UK businesses?

AI search optimisation matters because UK buyers now meet AI answers whether they go looking for them or not. Google is still the front door: Ofcom’s Online Nation report says 82% of UK adults use Google Search. But the same report found about 30% of searches now show an AI overview, and ChatGPT had 1.8 billion UK visits in the first eight months of 2025, up from 368 million a year earlier.

The way people ask has changed too. Google’s own guidance notes that people are asking longer and more specific questions in AI search, plus follow-ups. A buyer who once typed “CRM small business” now asks for “the best CRM for a 12-person agency that integrates with Xero”, and gets a two- or three-option shortlist back.

That changes what visibility means. Ranking first still matters, but you also need to know whether assistants mention you, describe you correctly and link to you. One symptom we see often is organic traffic slipping while enquiry numbers hold steady. That usually means people are reading about you somewhere you can’t see.

There’s an upside. In a Semrush study, the average visitor from AI search was 4.4 times as valuable as a traditional organic visitor, measured by conversion rate. People who arrive from an assistant have often done their comparing already.

How does AI SEO work?

AI SEO works on five connected parts, covered below. Most AI search tools retrieve live web pages before they write an answer, so each part improves the odds that your pages are retrieved, understood and trusted.

1. Access: can AI crawlers reach your site?

Access comes first because nothing else matters if crawlers are blocked. Google says there are no extra technical requirements for AI Overviews or AI Mode beyond being indexed and eligible for a snippet. The other platforms use their own search crawlers, and each one has to be allowed in.

The distinction between search and training crawlers matters. OpenAI says the two settings are independent, so you can allow OAI-SearchBot while disallowing GPTBot. Google is equally clear that Google-Extended doesn’t affect inclusion in Google Search. Blocking the training crawlers is a business decision; blocking the search crawlers makes you invisible.

Check your CDN and security settings as well as robots.txt. Cloudflare switched to blocking AI crawlers by default in July 2025, and plenty of WordPress security plugins do something similar without telling anyone.

2. Entity clarity: does AI know who you are?

An AI system has to understand what a business is, what it sells, where it operates and why it’s relevant to the question. It builds that picture from every source that mentions you, and contradictions confuse it.

A typical example: the website calls the company a “growth partner”, LinkedIn says “digital agency” and Companies House lists a third name. That’s three descriptions and no certainty. Pick one name and one plain description, then use them everywhere: website, Google Business Profile, LinkedIn, directories and press. Add accurate Organization or LocalBusiness schema, keep author profiles current and make sure contact details match.

3. Answer-ready content: can AI quote you?

AI systems lift self-contained passages, so pages written as one long argument give them little to work with. Answer-ready content leads with a direct answer of around 40 to 60 words, then backs it up with evidence and an example.

In practice that means question-led headings, short paragraphs, a definition in the first sentence of a definition, and comparison tables, which tend to be lifted almost intact. You don’t have to start from scratch. Restructuring your twenty most important existing pages usually does more than publishing twenty new ones.

4. Authority and corroboration: does anyone else vouch for you?

Your website is one input among many. Reviews, press coverage, directory listings, podcasts, trade publications and partner pages all feed the picture an AI system forms. In an Ahrefs study of 75,000 brands, branded web mentions correlated more strongly with AI Overview visibility than backlinks did. That’s correlation, not proof, but it explains why digital PR now sits inside AI SEO rather than next to it.

5. Measurement: are you showing up, and is it working?

AI answers vary by platform, wording, location and time, so a one-off check tells you very little. Measurement needs a fixed set of buying-intent prompts, run on a schedule. A useful programme tracks:

• Mention rate across the agreed prompts
• Citations and links, by platform
• Share of voice against named competitors
• Whether the description of your business is accurate
• Referral visits from AI platforms in GA4
• Leads and sales from those visits

Some free tools help. Bing Webmaster Tools now has an AI Performance report showing Copilot citations by page. Google, on the other hand, folds AI Overviews and AI Mode traffic into the normal Web data in Search Console, so you can’t split it out there.

Which AI platforms should UK businesses prioritise?

For most UK businesses, Google’s AI Overviews and AI Mode come first, because that’s where the reach is and because traditional SEO work pays off most directly there. AI Mode passed 1 billion monthly users by July 2026, according to Google.

After Google, our view is:

• ChatGPT has the most intent. With 900 million weekly users as of February 2026, it’s where people increasingly ask for recommendations and act on them.
• Gemini has scale, with 950 million monthly users reported in the same Google update, and shares Google’s view of the web.
• Perplexity is smaller but punches above its weight for B2B and research-heavy purchases, and it shows its sources clearly, which makes it easy to monitor.
• Copilot matters if you sell to businesses that live in Microsoft 365, and it runs on Bing, which many SEO plans ignore.

What does an AI SEO programme include?

An AI SEO programme starts with an audit of AI visibility and traditional search, then works through a roadmap. The audit answers four questions: which platforms can reach your site, where your brand appears for valuable questions, which competitors appear instead, and where your supporting evidence is thin.

The roadmap usually covers:

• Technical access: crawler directives, indexation, rendering, canonicals, speed and mobile usability
• Entity architecture: the organisation, its services, products, authors and locations, and how they connect
• Commercial content: service pages, comparison pages, pricing guides and sector examples
• Answer content: definitions, FAQs and short answers to the questions buyers type into assistants
• Evidence: case studies, expert authorship, original research and reviews
• Off-site authority: digital PR, suitable directories and coverage in industry publications
• Reporting: prompt tracking, citations and AI referral traffic alongside rankings and leads

The point of running all this as one programme is that the same work serves both channels. A strong service page ranks in Google and gives ChatGPT something to cite. Splitting it between an “SEO team” and a “GEO team” usually means two lots of reports and nobody owning the service page.

How long does AI SEO take?

Technical fixes can improve access within weeks, once pages are recrawled. Lasting visibility takes longer, because third-party corroboration builds slowly and AI platforms update their indexes and models on their own schedules. Expect early signals, such as better crawl coverage and a first few citations, within a few months, and judge business impact over a longer stretch.

Our work with Clatterbridge Private Clinic, the private patient service of The Clatterbridge Cancer Centre NHS Foundation Trust, shows the pace. We’ve worked with the clinic since 2018 and began adapting the work deliberately for AI search in 2025. Entity clarity was a real problem: the name “Clatterbridge” is shared by the NHS cancer centre, the Wirral health park where it began and a separate hospital on the same site. The clinic now has 12 citations in AI answers to North West private cancer care questions. That’s a modest number, earned in a sector where AI systems are cautious about whose information they trust.

The early commercial signs can be strong, even on small volumes. For HNK Solicitors, visitors arriving from AI assistants converted at a key-event rate of 12.57%, against 2.07% for organic search overall. HNK’s own case study warns that the AI volumes are much smaller, so that percentage is more volatile.

Be cautious of anyone guaranteeing that ChatGPT will recommend you for a given prompt. OpenAI says plainly that placement in ChatGPT search isn’t guaranteed, and no agency controls these platforms.

What does AI SEO cost?

AI SEO costs vary widely, so treat any flat price quoted before someone has looked at your site with suspicion. Four things drive the cost:

• The state of your current SEO, since weak foundations come first
• The number of pages that need restructuring
• Your existing external footprint: reviews, press and listings
• Whether you need ongoing monitoring or a one-off review

Work usually falls into three shapes: a diagnostic audit, a defined restructuring project, or a monthly programme that combines content, technical work, authority building and visibility reporting. Market and competition matter too. A builder who wants ChatGPT enquiries from a 30-mile radius needs far less than a national law firm trying to become the name AI assistants give for personal injury claims across England and Wales.

Be wary of cheap packages that turn out to be software you operate yourself, or templated work that ignores your sector. They tend to disappoint for the same reason cheap SEO always has.

How should a business start with AI SEO?

Start with a ten-minute test. Open ChatGPT and Perplexity and ask five questions a potential buyer would ask before contacting you. Use the category question, not your brand name: “best family solicitor in Chester”, not “Smith & Co reviews”.

What you see tells you where you stand:

• Competitors appear and you don’t. You have a gap that won’t close on its own, and entity clarity is usually the quickest fix.
• Nobody credible appears. There’s an open slot in your category, and it’s worth moving before someone else does.
• You appear, but the description is wrong. Fix the sources feeding that description, starting with your own website and main profiles.

From there, map each important buyer question to a page that answers it properly, remove technical blockers, add proof and strengthen your off-site presence. Our complete guide to AI SEO and GEO sets out the full plan, and if you’re weighing up whether to start with traditional SEO or GEO, read SEO vs GEO.

FAQs

Is AI SEO the same as SEO?

No, but it’s built on it. AI SEO keeps the SEO foundations, such as crawlability, indexing and helpful content, then adds work aimed at AI answers. That means answer-ready passages, a consistent brand description everywhere, mentions on other trusted sites and tracking citations across AI platforms.

Is AI SEO the same as GEO?

GEO is one part of AI SEO. GEO focuses on how generative engines describe, cite and recommend your brand. AI SEO is the wider umbrella that combines GEO with answer engine optimisation and traditional SEO, measured across both kinds of search.

Does AI SEO mean using AI to do SEO?

Not in this guide. Some people use “AI SEO” for AI-assisted SEO tools, such as content drafting or keyword clustering. We use it to mean optimising your business so AI search platforms can find, understand and recommend it.

Do I need an llms.txt file?

It won’t hurt, but it isn’t required. llms.txt is a proposal for a standard, not an agreed one, and Google says you don’t need special AI text files or markup to appear in AI Overviews or AI Mode. Fix crawler access and content first.

How do I track traffic from ChatGPT and other AI assistants?

In GA4, look for referral traffic from domains such as chatgpt.com, perplexity.ai, gemini.google.com and copilot.microsoft.com, and group them into a custom channel. Google’s AI features are counted inside normal Search Console data, so track those through prompt monitoring instead.