AI search isn’t coming — it’s here. Generative engine optimisation (GEO) is how UK businesses keep showing up when customers ask ChatGPT, Gemini, Perplexity or Google’s AI Overviews to recommend a service. AI Overviews appeared in 13% of search results in March 2025; today they sit on roughly 25%. If your only SEO strategy still optimises for blue-link rankings, you’re already behind. This guide explains what GEO is, why it matters now, and the practical tactics small UK businesses can use to get cited by AI engines.

What Is Generative Engine Optimisation?

Generative engine optimisation is the practice of structuring content so AI systems are more likely to cite you when generating answers. With traditional SEO, the goal is a top-10 blue link. With GEO, the goal is being the source the AI quotes when a customer asks “best Google Ads agency in Leicester“ or “how do I improve my conversion rate?“.

The skills overlap heavily — both reward authoritative content, technical fundamentals, and topical depth — but the metrics differ. Traditional SEO measures clicks, impressions and rankings. GEO measures brand mentions, citation rate, and share of voice within AI answers.

The terminology is mid-rebrand. You’ll see AI SEO, LLM SEO, ChatGPT SEO and generative engine optimisation used interchangeably. They describe the same job. GEO is becoming the settled term, drawn from the academic research that defined the field.

Why GEO Matters for UK Businesses in 2026

Three numbers make the case.

Google’s AI Overviews now appear in around 25% of search results, up from 13% in March 2025 — almost double in twelve months, according to Conductor’s analysis of 21.9 million queries [opens in new tab].

BrightEdge tracking [opens in new tab] puts the figure higher again — AI Overviews on 48% of queries by February 2026.

Some industries are already past saturation: 88% of healthcare queries, 83% of education queries, 82% of B2B technology queries now trigger AI Overviews.

Bar chart showing Google AI Overviews adoption rising from 13% to 25% of UK search results in twelve months, with healthcare (88%), education (83%) and B2B technology (82%) queries already past 80% saturation

The hidden cost is more practical: when AI Overviews answer a query directly, most searches now end without a single click to any website. That’s a click you used to win on a position-3 ranking. Now you only win it if the AI cites you in its answer.

For a UK SME spending money on SEO, GEO isn’t a “watch this space” category. It’s a defensive necessity.

The Three GEO Tactics That Actually Work

Peer-reviewed research from IIT Delhi, Princeton and the Allen Institute for AI (Aggarwal et al., 2024) [opens in new tab] demonstrated that targeted optimisation can boost AI citation visibility by up to 40% in generative engine responses. Three tactics matter most.

1. Add direct quotations. Where you’d previously paraphrase research, quote it directly with attribution. AI engines pattern-match on quotation marks plus a credible source — they treat the surrounding context as more citable. A blog post with three direct quotations performs measurably better in AI citation tests than the same post with paraphrased equivalents.

2. Integrate original statistics. Publish data your competitors don’t have. A short customer survey, a regional service-cost benchmark, an internal study of conversion rates from your client base — all become statistics AI engines can quote. You become a primary source.

3. Cite original sources within your content. Counter-intuitively, citing other sources improves your citation rate. AI systems treat well-sourced articles as more trustworthy and prefer them as a reference point. Link to studies, government data, regulatory documents and academic papers within your articles.

UK small business owner working on a laptop in his shop — implementing generative engine optimisation tactics

These three together shift content from “marketing copy” to “citable source” — the single biggest mental-model change for GEO.

The Technical GEO Setup

Three technical fundamentals matter more than they did for traditional SEO.

Schema markup. Implement schema for Article, Organization, FAQPage, HowTo and BreadcrumbList at minimum. AI engines parse structured data more reliably than free-flowing HTML, which makes schema-marked content easier to cite.

robots.txt and AI crawlers. Many sites accidentally block AI crawlers because they don’t realise the user agents have changed. Make sure your robots.txt does not block these:

  • GPTBot (OpenAI / ChatGPT)
  • ClaudeBot (Anthropic)
  • PerplexityBot (Perplexity)
  • Google-Extended (Google’s AI training crawler)
  • CCBot (Common Crawl, used by multiple AI systems)

Blocking these crawlers means you literally cannot be cited by their AI products.

llms.txt. A new emerging standard, llms.txt is a plain-text file at your domain root (yoursite.co.uk/llms.txt) that tells AI systems how to interpret your site. Not yet universally adopted, but early adopters will be ahead of the curve as the standard matures.

Frequently Asked Questions

What is generative engine optimisation?

Generative engine optimisation (GEO) is the practice of structuring content so AI systems like ChatGPT, Gemini, Perplexity and Google’s AI Overviews are more likely to cite your brand when answering user queries. Unlike traditional SEO, which targets blue-link rankings, GEO targets citations within AI-generated answers.

How is GEO different from traditional SEO?

Traditional SEO optimises for ranking position on a search results page. GEO optimises for being cited within AI-generated answers. The tactics overlap — authoritative content, technical fundamentals and backlinks matter for both — but GEO additionally rewards quotation density, statistical depth, and source citation.

How long does GEO take to work?

Faster than traditional SEO. AI engines re-crawl and re-cite content within days to weeks rather than the 3–6 months traditional SEO typically requires. Expect early citation results within 4–8 weeks of implementing GEO tactics on existing high-quality content.

Should I stop doing traditional SEO?

No. Traditional SEO still drives click-through traffic that converts. GEO determines whether you’re cited in the AI answers that increasingly precede those clicks. Both reinforce each other — same fundamentals, different optimisation layer.

Conclusion: Get Cited or Get Skipped

Generative engine optimisation isn’t a future trend — it’s already deciding which UK businesses customers see when they ask AI for recommendations. Schema, quotation density, original statistics, AI crawler access and source citation are the practical levers that move the needle. Each one is implementable by a small business without an enterprise budget.

The agencies and brands that build GEO into their content strategy in 2026 will compound an advantage over the next 24 months. The ones who wait will spend 2027 catching up.

Want help putting generative engine optimisation into practice for your business? Foundry helps UK small businesses get cited by AI engines and ranked in traditional search at the same time. Get in touch with the team [opens in new tab] for a no-obligation chat.