GEO & AI SEO

What is
GEO?

GEO stands for Generative Engine Optimisation. It is the discipline that determines whether your business gets cited in AI answers from ChatGPT, Gemini, Perplexity and Google AI Overviews. Where SEO is about positions in Google, GEO is about citations in AI. The GEO market is growing at 40% per year. Research from Princeton University shows that GEO techniques can increase AI visibility by up to 115% for content outside the top ten. Yet only 43% of UK marketers have started implementing GEO strategies. This guide explains exactly what GEO is, how it differs from SEO, which techniques work and how to get started.

40%

annual growth of the GEO market

115%

visibility lift from citation-based GEO

40%+

of UK searches now trigger AI Overviews

43%

of UK marketers implementing GEO

Generative Engine Optimisation: the definition

GEO (Generative Engine Optimisation) is the process of optimising your online presence so that AI search engines cite your business in their answers. The term was introduced in 2023 by researchers at Princeton University and the Georgia Institute of Technology. Since then, it has grown into a discipline of its own alongside traditional SEO.

With SEO, you optimise for Google's algorithm: building backlinks, integrating keywords, improving technical speed. The goal is a high position in search results. With GEO, you optimise for AI models: writing quotable content, implementing structured data, building authority across multiple sources. The goal is that AI recommends your business when users ask relevant questions.

The Princeton research showed that specific GEO techniques produce measurable results. Adding citations and external sources to content increased AI visibility by 115% for lower-ranked pages. Adding statistics lifted visibility by 41%. Adding quotations increased it by 28%. These are not vague improvements. They are quantified effects from controlled research.

Citations versus positions

The fundamental difference lies in the output. SEO delivers positions: you rank at number 1, 2 or 3 in Google. GEO delivers citations: AI names your business in its answer and explains why. A citation is more powerful than a position. It is an active recommendation by a system the user trusts. This is why ChatGPT referral traffic converts at 15.9%, compared to 1.76% for Google organic. A 9x premium.

GEO at a glance

Full name

Generative Engine Optimisation

Goal

Get cited in AI answers (ChatGPT, Gemini, Perplexity, Google AI Overviews)

Difference from SEO

SEO = positions in Google. GEO = citations in AI. Both are needed, but GEO is the growing discipline.

Core pillars

Quotable content, structured data, authority building, broad online presence, monitoring

UK market context

54% of UK adults use AI tools. AI Overviews appear in 40%+ of UK searches. Fewer than 10% of UK firms have a GEO strategy.

Key research

Princeton/Georgia Tech study: citations +115%, statistics +41%, quotations +28% visibility lift

GEO vs SEO: what are the differences?

GEO and SEO are related but fundamentally different disciplines. They share a common goal (online visibility), but the methods, metrics and results are different. Many business owners assume that good SEO automatically produces good GEO. It does not. The correlation between a high Google position and an AI citation is only 0.18. That is nearly random.

With SEO, the primary signal is backlinks: how many other websites link to you, and how authoritative are those websites? With GEO, the primary signal is quotability: does your content contain passages that AI can directly use as an answer to a user's question? A page with strong backlinks but vague marketing copy scores well in Google but does not get cited by AI. A page with fewer backlinks but concrete facts and clear structure can get picked up.

Consider a practical example. A solicitor's website that says "We provide excellent legal services with a client-focused approach" ranks well in Google thanks to strong backlinks. But when ChatGPT answers "Who is a good employment solicitor in Manchester?", it ignores that page. It picks the solicitor whose website says "Employment law specialist, 15 years' experience, free initial consultation, offices in Manchester city centre, rated 4.8 on Trustpilot." That is the difference between SEO content and GEO content.

The volatility of AI citations

Another difference is stability. Google positions change gradually. If you rank at position 3, you are likely still there tomorrow. AI citations are volatile. The UK shows 60% citation volatility in AI results. The same question can mention your business today and skip it tomorrow. This makes structural monitoring essential rather than a one-off check.

The metrics are different too. With SEO, you measure positions per keyword, clicks and organic traffic. With GEO, you measure citation frequency (how often you are mentioned), citation position (named first or third), sentiment (positive or neutral) and platform spread (which AI platforms mention you). These require different tools and a different monitoring approach.

Perhaps the most important difference is the impact on the user. A Google result is a suggestion: "here is a link, check it yourself." An AI citation is a recommendation: "I recommend this business because..." The trust users place in AI recommendations is significantly higher. 43% of UK consumers view AI search results as more trustworthy than organic search results. That trust makes AI's selection process even more consequential for businesses.

For UK businesses, this shift is already measurable. AI search summaries now reduce traditional click-through rates from 15% to 8% on average. When Google AI Overviews appear, 83% of searchers never click through to a website. The traffic that does come through from AI converts at dramatically higher rates. This dual effect means GEO is not optional for businesses that depend on being found online.

GEO does not replace SEO. It complements it. SEO ensures you are found. GEO ensures you are recommended. Both are needed in 2026.

How GEO works: the five pillars

1

Quotable content

AI extracts passages from your content. Those passages need to stand on their own: short paragraphs of 40 to 60 words, concrete facts, direct answers to questions. Start each section with the answer. Avoid marketing language. Write as though you are creating an encyclopedia entry, not a sales brochure. The Princeton study showed this approach increases citation rates by up to 28%.

2

Structured data

JSON-LD schema markup tells AI in a structured format what your business is, does and offers. 68% of all AI citations come from websites with strong structured data. Implement at minimum LocalBusiness, FAQPage and Service schema. For UK businesses, this means marking up your VAT number, Companies House registration and service areas. This is not optional. It is fundamental to GEO.

3

Authority building

AI cites trustworthy sources. Trustworthiness is determined by E-E-A-T signals: author information, source references, reviews, guest articles in trade media and mentions on independent platforms. For UK professionals, this includes listings on regulatory bodies like the Law Society, RICS, ICAEW or Gas Safe Register. The more confirmations of your expertise, the more often AI cites you.

4

Broad online presence

AI platforms crawl different sources. ChatGPT, Gemini and Perplexity each use different source pools. To be visible across all platforms, your business needs consistent listings across your website, Google Business Profile, Trustpilot, Checkatrade, trade directories and industry media. Consistency of information across these sources is what gives AI confidence to recommend you. Read more in how AI collects business information.

5

Monitoring and adjustment

AI citations are volatile: the UK shows 60% citation volatility in AI results. Without structural monitoring, you do not know whether you are visible, on which platforms or with what sentiment. GEO is not a one-off implementation but an ongoing process of measuring, analysing and adjusting. VestVale automates this monitoring across ChatGPT, Gemini, Claude and Google AI Overviews.

Start with GEO: measure your AI visibility

VestVale automatically monitors how ChatGPT, Gemini, Claude and Google AI cite your business. The first step of any GEO strategy is knowing where you stand.

Get started | from £19.95/mo

Proven GEO techniques that work

The first technique is rewriting your existing content for quotability. Take your most important pages and check: does each H2 section contain a passage of two to four sentences that can serve as a standalone answer to a question? Does each section start with the direct answer or with an introduction? Does the page contain concrete numbers, facts and specific information? If the answer is no, rewrite the content.

The second technique is adding FAQ sections to your pages. FAQs contain exactly the format AI needs: a question followed by a direct answer. Combine this with FAQPage schema markup and you give AI a ready-made set of questions and answers that it can directly use. For a UK estate agent, this might include "What does an estate agent charge in London?" with a specific answer citing typical fee ranges.

The third technique is adding statistics and data to your content. The Princeton study found that adding statistics increases AI visibility by 41%. Original numbers are gold for GEO. If you are the source of a statistic that AI cites, you are positioned as an authority. Customer survey results, industry benchmark data or usage statistics from your product are all valuable sources.

Comparison tables and structure

The fourth technique is implementing comparison tables. When someone asks AI "what is the difference between X and Y?", AI looks for content that already contains that comparison. A clear table with criteria and scores per option is exceptionally effective and often gets directly incorporated into AI answers. For UK businesses, this works particularly well for service comparisons, pricing tiers and feature breakdowns.

The fifth technique is actively collecting detailed reviews. Not "5 stars, great!" but reviews that specifically describe what went well, what problem you solved and what the outcome was. AI reads review text and uses it to describe your business. The richer the reviews, the better AI can position you. A Trustpilot review that says "Sorted our boiler emergency within 2 hours on a Sunday, fair price, left everything clean" gives AI far more to work with than "Good service."

The sixth technique is guest publications and PR. Publish articles in trade media, write contributions for industry websites and share your expertise on platforms where your target audience is active. AI interprets guest publications as evidence of expertise and authority. A feature in a trade journal carries more weight for AI than dozens of directory listings. For UK solicitors, this might mean writing for the Law Society Gazette. For accountants, contributing to AccountingWEB.

What to avoid

The Princeton research also showed what does not work. Promotional tone actually decreases AI visibility by 26%. Content that reads like a sales pitch gets filtered out. AI values informational, authoritative content over marketing copy. An authoritative tone only provides a modest 11.8% lift, suggesting that expertise expressed through facts and specifics matters more than simply sounding expert. Focus on substance over style.

Which sectors benefit most from GEO?

GEO is relevant for every business that wants to be found online, but some sectors benefit more than others. Professional services firms (solicitors, accountants, consultants) benefit strongly because AI users often ask specific questions: "Which solicitor in Leeds specialises in employment law?" That specificity makes it easier for specialised firms to get cited than for generalists.

E-commerce and retail are seeing explosive growth in AI traffic. When someone asks ChatGPT "what is the best espresso machine under £500?", AI can directly recommend a product. Online shops that optimise their product pages with comparison data, specifications and review summaries get cited more frequently. The UK retail sector is particularly affected, with 60 to 64% of consumers using AI when shopping.

Local businesses and the opportunity

Local businesses (tradespeople, restaurants, healthcare providers) have a particular opportunity. AI answers an increasing number of local queries and competition is still minimal. A plumber in Sheffield with strong Checkatrade reviews, a well-structured website and a Google Business Profile with detailed service descriptions is far more likely to be cited by AI than one with a basic brochure site. Read more in how AI shows local businesses.

SaaS companies and technology firms are the most AI-aware sectors. They understand that their customers are technically savvy and adopt AI tools first. Comparison content ("X vs Y", "best tools for...") works exceptionally well in this sector. These businesses were among the first to see both the opportunity and the threat of AI search.

In the UK, AI adoption is high and growing fast. 54% of adults use AI tools, with 79% of 16 to 24-year-olds already using them. 41% of B2B buyers cite AI-assisted search as their primary discovery channel. This means UK businesses are facing both sides of the GEO equation: their customers are using AI to find businesses, and their competitors are starting to optimise for it.

The legal and accounting professions face particular disruption. These are industries where consumers traditionally relied on word of mouth and Google to find a provider. Now, AI is becoming the first point of contact. A potential client asking ChatGPT "Do I need a solicitor for a commercial lease?" gets not only an answer but a recommendation. The solicitor who appears in that answer captures the lead. The one who does not, never knew the opportunity existed.

The timing is now

The sectors that benefit least are businesses with a purely offline customer base and businesses in very niche markets where AI search volume is low. But even there, the shift is happening. As AI becomes mainstream, more sectors will feel the impact. The question is not whether GEO becomes relevant for your industry, but when. And the earlier you start, the stronger your position will be when it does.

Getting started with GEO: a step-by-step plan

Week 1 to 2: Baseline measurement. Before you start optimising, you need to know where you stand. Ask relevant questions to ChatGPT, Gemini and Perplexity about your industry and location. Is your business mentioned? With what sentiment? On which platforms? That baseline is your starting point. Or use a tool like VestVale that does this automatically across all major AI platforms.

Week 3 to 4: Structured data. Implement JSON-LD schema markup on your website. Start with LocalBusiness (or Organization), FAQPage and Service schema. This is the fastest way to give AI structured information about your business. Test with Google's Rich Results Test. For UK businesses, ensure your schema includes your geographic service area, opening hours and accepted payment methods.

Optimising content for AI

Month 2: Content rewriting. Take your five most important pages and rewrite them for quotability. Short paragraphs, direct answers, concrete facts, specific H2 headings phrased as questions, FAQ sections at the bottom. This is the core of your initial GEO investment. Focus on the pages that answer the questions your customers ask most frequently. For a UK accountant, that might be your services page, pricing page and pages about specific topics like VAT registration or Making Tax Digital.

Month 3 to 4: Authority building. Start with active review collection on multiple platforms. Trustpilot, Google Business, Checkatrade or your industry equivalent. Publish a guest article in a trade publication. Check and update all your directory listings for NAP (Name, Address, Phone) consistency. Add author information to your blog content. For regulated professions, ensure your professional body listing is complete and accurate.

Month 5 to 6: Measure and adjust. Check again how you score in AI answers. Compare with your baseline. Which pages get cited and which do not? Which platforms mention you and which do not? Adjust based on data, not intuition. Double down on what works and rethink what does not.

An ongoing process

Ongoing: Publish and monitor. GEO is not a project with an end point. Publish new content regularly, collect reviews, update your profiles and monitor your visibility structurally. The businesses that work consistently on GEO build a cumulative advantage that becomes increasingly difficult for competitors to close. To understand how AI assembles its answers and what that means for your content strategy, see our guide on how AI assembles its answers.

Frequently asked questions about GEO

Does GEO replace traditional SEO?

No. GEO is a complement to SEO, not a replacement. A strong Google position is still necessary because AI platforms search the web and use Google's index as a starting point. But SEO alone is no longer enough. The businesses that perform best combine SEO and GEO as two layers of online visibility. Many GEO techniques, like structured data and quotable content, also improve your traditional SEO performance.

How long before GEO produces results?

First citations typically appear after one to three months. Structural visibility with consistent citations across multiple platforms takes six to eighteen months. The timeline depends on your current online presence, competition in your sector and the intensity of your GEO efforts. Start with optimising existing content for the fastest results.

What does GEO cost?

The basics cost time but little money: rewriting content, implementing structured data and collecting reviews. Monitoring can be done manually (free but time-consuming) or with a tool like VestVale from £19.95 per month. For SMEs, GEO is achievable as part of your existing content marketing. The ROI is high because competition is still low and AI traffic converts at 9x the rate of Google organic.

Which content formats work best for GEO?

FAQ pages with schema markup score best: they contain the exact format AI needs. Comparison tables, research data with statistics, how-to guides and reviews with specific details also work strongly. Avoid vague marketing copy. The Princeton study confirmed that promotional tone decreases AI visibility by 26%. Focus on concrete, factual information that AI can directly cite.

Is GEO relevant for small businesses?

Very much so. Small businesses often have a natural advantage in GEO because they serve specific niches and locations. A specialist plumber in Bristol has less competition for AI citations than a national chain. The key is being specific about what you do, where you do it and who you serve. Specificity is exactly what AI needs to match you to user questions.

How do I measure my GEO performance?

GEO performance is measured by citation frequency, citation position, sentiment and platform spread. You can test manually by asking AI platforms questions your customers would ask, but because AI answers vary between sessions, one-off checks are unreliable. VestVale automates this monitoring across ChatGPT, Gemini, Claude and Google AI, tracking your visibility over time to give you actionable data.

Start your GEO strategy with data

VestVale automatically monitors how ChatGPT, Gemini, Claude and Google AI cite your business. Measure your AI visibility and optimise with purpose.

From £19.95/mo ex. VAT. Cancel monthly.