What Is GEO? Generative Engine Optimisation Explained for UK Businesses

Summary: Generative engine optimisation (GEO) is the work of making your business and your content visible inside AI-generated answers: Google’s AI Overviews and AI Mode, ChatGPT, Perplexity, Gemini and Claude. Where SEO aims for a ranking position on a results page, GEO aims to be the source an AI system reads, trusts and cites when it writes its answer. The two overlap heavily. Most of what earns a citation is clear, factual, well-structured, well-linked content on a technically sound site, which is also what earns a ranking.

A growing share of searches now end with an answer rather than a list of links. Our own research on 1,000 UK keywords found AI Overviews on 42% of them, and a separate study of 87.6 million monthly UK queries found that 54.4% ended without a click to any website. If your customers ask ChatGPT which accountant to use, or Google answers their question before they reach your page, being on page one is no longer the whole job. This guide explains what generative engine optimisation is, how it differs from the SEO you already know, what our UK studies show about where things stand, and the seven strategies we use to get client content cited. It links out to every piece of AI search research and guidance we have published, so treat it as the starting point for the whole topic.

What is generative engine optimisation?

Generative engine optimisation is the practice of structuring, writing and promoting content so that generative AI systems can find it, understand it and use it when they produce an answer. A “generative engine” is any system that writes a response rather than returning a list: Google’s AI Overviews and AI Mode, ChatGPT with search, Perplexity, Microsoft Copilot, Gemini and Claude all qualify.

These systems do not rank pages in the way a search engine does. When they answer a question about a product, a service or a fact, most of them retrieve a set of candidate sources, read them, and compose an answer, usually with citations back to the pages they drew on. GEO is the work of becoming one of those sources. It has three parts:

• Being retrievable: your pages are crawlable by AI systems, indexed, fast, and structured so the relevant passage is easy to find.
• Being quotable: the page contains clear, self-contained statements of fact that an AI can lift without needing the surrounding context.
• Being trusted: your brand is mentioned, linked and described consistently across the web, so the system treats you as a credible source rather than an unknown one.

You will also see the terms answer engine optimisation (AEO), LLM SEO and AI SEO. They describe the same work from slightly different angles. AEO tends to focus on direct answers to questions, including featured snippets. LLM SEO focuses on the large language models themselves. We use GEO as the umbrella term and treat the others as parts of it.

GEO vs SEO: what actually changes

GEO is not a replacement for SEO. The systems that generate answers still depend on a search index to find candidate pages, and Google’s own guidance on succeeding in AI search says the foundations are the same as for ordinary search results. What changes is what you are optimising towards, how success is measured, and which qualities of a page matter most.

The practical consequence is that almost everything in good on-page SEO still applies, and a handful of things matter more than they used to: short, direct answers at the top of sections; attributed statistics; structured data; a current “last updated” date; and a brand that is described the same way everywhere it appears. If your on-page basics are not in place yet, start with our guide to on-page SEO and come back; GEO builds on top of it, not instead of it.

Why GEO matters now: what our UK research shows

Most writing about AI search relies on US figures. We publish our own studies on UK search behaviour, and they are the evidence behind this guide. The headline findings:

• AI Overviews appear on 42% of UK searches. Our AI Overviews UK study analysed 1,000 UK keywords selected without filtering for AI features, and 420 of them showed an AI Overview. 67% of those appeared on informational queries, only 9% on commercial or transactional ones, and finance and local service searches showed none at all.
• 54.4% of UK searches end without a click. Our zero-click study covered 87.6 million monthly UK queries. Pages with AI summaries or knowledge cards ran at 77 to 100% zero-click, against below 50% for standard organic results.
• ChatGPT is the most searched AI platform in the world, with Perplexity growing 66% year on year, according to our global AI platforms study. Where people go to ask questions is shifting, and the shift is measurable.
• 98.7% of UK searches display at least one SERP feature. The plain ten blue links are the exception, not the rule, which is why being extractable matters more than being merely present.

Read together, the picture for a UK SME is clear. Informational searches are increasingly answered in place, commercial searches still send clicks, and the businesses that get cited in the answer are the ones that shape the decision before the click happens. The full set of our research is below; each study is a spoke of this guide and is kept up to date.

How generative engines choose what to cite

Knowing how the answer is built tells you where to put the effort. The process differs in detail between platforms, but the shape is the same.

1. The system reads the question and often rewrites it into several sub-queries. A question like “which CRM is best for a small UK accountancy firm” becomes searches about CRMs, about UK accountancy firms, and about pricing.
2. It retrieves candidate pages for those sub-queries, usually from a conventional search index. If you are not indexed, or not ranking anywhere near the top for the sub-queries, you are not in the pool.
3. It reads the candidates and selects passages that directly answer the sub-queries. Pages that state the answer plainly, with a figure and a source, are easier to use than pages that circle the point.
4. It composes the answer and attaches citations. Which sources are cited depends on how clearly they answered, how much the system trusts them, and how recent they are.

Two points follow. First, you cannot skip the search index: ranking for the component questions is a prerequisite, which is why GEO sits on top of SEO. Second, the unit that gets cited is a passage, not a page. A 3,000-word guide earns citations through its individual sections, each of which needs to stand alone. We cover the mechanics for each platform in our guides to getting cited by AI and LLMs, appearing in AI results at the top of Google, and getting recommended on ChatGPT.

Seven GEO strategies to get featured in AI results

These are the seven strategies we apply on client sites, in the order we usually apply them. None of them is exotic. Together they cover retrievability, quotability and trust.

1. Structure content for machine readability

Generative engines extract information; they do not read for pleasure. Use clear headings that state the topic of each section, phrase subheadings as the questions people ask, keep sections short and focused, and put data in bullet lists and tables rather than prose. A section that opens with a one-sentence answer and then expands on it is the easiest kind of content for an AI to lift accurately. Our on-page SEO guide covers heading structure in detail.

2. Use schema markup to strengthen the signals

Structured data tells systems what a page is and what it contains: an Article, an FAQPage, an Organisation with a name, address and logo, a Product with a price. Schema does not guarantee inclusion in an AI answer, but it removes ambiguity about who you are and what the page covers, which is exactly the kind of ambiguity that stops a system citing you. Our guide to schema and structured data explains which types to use and how to add them in WordPress.

3. Build authority through citations and mentions

AI systems favour sources that are widely referenced. Backlinks from reputable sites still matter, and so do mentions of your brand that carry no link at all: a trade publication naming you, a directory describing your services, a podcast transcript quoting your founder. The systems read all of it, and consistency across those mentions builds confidence that you are who you say you are. We explain the difference in what brand mentions without links actually do for SEO, and the link side in our guide to backlinks.

4. Create clear answer spans and fact-based content

An answer span is a short passage that fully answers one question without needing the rest of the page. Open each section with one, state facts with their source and date, keep sentences short, and link to deeper pages for the detail. A recent academic study on generative engine citation behaviour found that content with strong metadata quality, freshness and semantic structure was more likely to be cited by AI engines. In practice that means the Quick Answer box at the top of this page, the attributed statistics in the research section, and the table above are all doing GEO work.

5. Keep content fresh and updated

Generative engines lean towards recent sources because the answer is being written today. Show a visible last-updated date, review pages on a schedule, and refresh statistics, legislation, prices and product details when they change. A page that still quotes 2023 figures is less likely to be chosen over one with figures from this year, even if the older page ranks higher.

6. Optimise for conversational and multi-step queries

People ask AI systems long questions and then ask follow-ups. Anticipate the next question in the content itself: a “what to do next” subheading, an FAQ that covers the obvious objections, internal links to the follow-up topics. Structure content from the broad answer down to the specific detail so that whichever sub-query the system is working on, there is a section that matches it.

7. Measure, monitor and adapt

GEO is not finished when the content is published. Search your core topics in ChatGPT, Perplexity and Google’s AI Mode and record whether you are cited and how you are described. Track referral traffic from AI platforms in your analytics. Use an AI visibility tool to monitor citation frequency over time, audit quarterly, and rewrite the sections that are being passed over. We cover the metrics in the measurement section below.

GEO across the platforms

The strategies above apply everywhere, but each platform has its own habits, and we have written a guide for each.

One technical point applies to all of them. AI crawlers (GPTBot, PerplexityBot, Google-Extended, ClaudeBot and others) need to be able to reach your pages. Check your robots.txt, your firewall and your CDN rules before anything else, because no amount of content work helps a page the systems cannot fetch. Our technical SEO guide covers crawl access.

How to measure GEO

Rankings and clicks do not capture GEO, because a citation in an AI answer may send no click at all while still shaping the decision. We track four things alongside the usual SEO KPIs:

• Citation presence: for a fixed set of questions, whether each platform cites your site, checked on a schedule.
• Brand mentions in answers: whether your business is named, with or without a link, and how it is described.
• AI referral traffic: sessions arriving from chatgpt.com, perplexity.ai and similar, segmented in analytics.
• Share of answer: for your core topics, how often you appear against named competitors.

Set the baseline before you change anything, then review monthly. Our guide to measuring SEO results explains how these fit with the rest of your reporting.

Where GEO fits in a UK SME’s SEO plan

For most small and medium businesses, GEO is not a separate project. It is a set of standards applied to the content and technical work you should be doing anyway: answer first, source every figure, mark the page up, keep it current, make the brand consistent, and check where you are being cited. The order of work we recommend is: fix crawl access and technical faults, get the on-page structure right on the pages that matter, build the research and FAQ content that earns citations, then measure.

If you would rather have it done for you, our generative engine optimisation service covers all seven strategies for established sites, and our AI SEO service for UK small businesses is the scaled-down version for firms starting from a smaller footprint. Either way, the first step is a free audit that shows where you currently appear in AI answers, and where you do not. Get in touch and we will run it.

Frequently asked questions

See also, our complete guide to SEO for UK businesses.