What Is AEO and GEO? How UK Small Businesses Get Cited by AI Search Engines
AEO (Answer Engine Optimisation) is the practice of structuring your website so that AI tools like ChatGPT, Perplexity and Google AI Overviews can accurately read and cite your business. GEO (Generative Engine Optimisation) is the longer-term discipline of keeping your content fresh, specific and credible enough that AI systems choose to reference you again and again. In 2026, most UK small business websites are invisible to AI search — not because the content is poor, but because it is missing a handful of technical and structural signals that take less than a day to add.
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Run the free check →What Is AEO (Answer Engine Optimisation)?
Answer engines are tools that generate a direct answer to a question rather than a list of links. ChatGPT, Perplexity, Google AI Overviews and Bing Copilot all work this way. When someone asks "who is the best business mentor in Manchester?" or "what is vibe coding?", these tools generate a paragraph-length answer — and they pull that answer from websites they have read and trust.
AEO is the practice of making your website readable and trustworthy for those engines. It is not about gaming algorithms. It is about making your content genuinely clear, structured and technically accessible so AI tools can find, parse and confidently cite what you have written.
The key difference from traditional SEO: traditional SEO gets you ranked in a list. AEO gets you cited in the answer itself — which is where user attention has shifted.
What Is GEO (Generative Engine Optimisation)?
GEO is the sustained discipline that sits on top of AEO. Once your site is technically accessible to AI, GEO is about being chosen over other sources. AI models weigh several factors when deciding which sources to cite:
- Specificity — concrete figures, named examples and specific advice outperform vague generalisations
- Freshness — recently updated content signals relevance; stale content signals neglect
- Credibility — author credentials, named sources, and links to authoritative third-party data
- Structure — clear H2/H3 headings, short paragraphs and FAQ sections that AI models can parse cleanly
GEO is, in essence, a commitment to writing with specificity and updating regularly. It rewards businesses that treat their website as a living document rather than a one-off project.
Which AI Engines Matter for UK Small Businesses?
| Engine | Who uses it | Why it matters |
|---|---|---|
| Google AI Overviews | Anyone using Google search (still the dominant UK search engine) | Appears above organic results; cited businesses get prominent visibility without needing to rank #1 |
| ChatGPT (with Browse) | 100M+ monthly users worldwide; growing SMB adoption in the UK | Used for research, supplier discovery and recommendations; can directly refer a prospect to your website |
| Perplexity AI | Growing fast among knowledge workers, consultants and founders | Cites sources prominently and links back to them — high-value referral traffic for niche businesses |
| Bing Copilot | Windows users, Microsoft 365 subscribers, Bing searchers | Integrated into Edge browser and Microsoft tools; SMB decision-makers are a key demographic |
The good news: the signals that make you visible on one platform largely work across all four. You do not need four separate strategies.
The 8 Most Important AEO and GEO Signals
1. Direct answers in the first paragraph
State the answer to the page's core question in the opening paragraph. AI engines use the inverted pyramid structure — most important first.
2. FAQ sections with question-and-answer pairs
Dedicated Q&A sections are the single highest-impact AEO change most small business websites can make. AI engines mine FAQ content heavily.
3. Schema.org structured data (JSON-LD)
Article, FAQPage, LocalBusiness and BreadcrumbList schema tell AI and Google crawlers exactly what type of content you have published and who wrote it.
4. llms.txt file
A machine-readable brief at yoursite.co.uk/llms.txt that tells AI crawlers what your business does, who you serve, and which pages are most important.
5. Open robots.txt for AI crawlers
If your robots.txt blocks bots, AI engines cannot read your site. Ensure GPTBot, PerplexityBot and ClaudeBot are not disallowed.
6. Clear H2/H3 heading structure
AI models use heading hierarchy to understand page structure. Each heading should directly describe what the section answers — not a clever headline that obscures the topic.
7. Specific facts and figures
Named statistics, case study results, and concrete before/after examples give AI systems citable, factual content. Generic claims without evidence are deprioritised.
8. Content freshness (dateModified)
Update your key pages regularly and use dateModified in your schema markup. AI systems weight recent content more heavily, especially on fast-moving topics.
Schema Markup: What Small Businesses Actually Need
Schema markup (also called structured data or JSON-LD) is code you add to your web pages that tells search engines and AI crawlers exactly what your content is, who wrote it, and what it covers. It does not change how your page looks to visitors — it only affects how machines read it.
For most UK small businesses, three schema types cover the majority of AEO value:
Article schema — goes on every blog post and long-form content page. Tells AI crawlers the headline, author, publication date and topic.
FAQPage schema — wraps your FAQ section content so AI engines can parse individual questions and answers. This is one of the highest-impact schema types for AEO.
LocalBusiness schema — goes on your homepage or contact page. Includes your business name, address, phone, email, opening hours and service area. Critical for local search and AI-generated local recommendations.
What Is an llms.txt File?
An llms.txt file is a plain text file placed at the root of your website (e.g. yoursite.co.uk/llms.txt) that gives AI crawlers a structured brief about your business. Think of it as a sitemap for AI systems — not for navigation, but for understanding.
A well-written llms.txt covers: what your business does, who you help, what your core expertise is, and which pages are most important. It is written in simple prose, not code. Many AI systems including Perplexity and Anthropic's Claude actively read llms.txt files when they crawl a site.
Checking Your robots.txt
Your robots.txt file (yoursite.co.uk/robots.txt) controls which automated bots can crawl your site. If it blocks all bots, AI engines cannot read your content — and they cannot cite what they cannot read.
❌ Blocks AI crawlers
- User-agent: *
- Disallow: /
- (or: User-agent: GPTBot / Disallow: /)
✅ Allows AI crawlers
- User-agent: *
- Disallow:
- Sitemap: /sitemap.xml
Check your robots.txt now by typing yoursite.co.uk/robots.txt directly into your browser. If you see a broad Disallow rule, you may be blocking AI engines from indexing your content.
AEO vs GEO: How They Work Together
AEO is the foundation — technical accessibility, schema markup, FAQ sections and llms.txt. Get these in place and AI engines can find and read your content. GEO is the ongoing discipline that determines whether they choose to cite you: fresh, specific, well-structured content written by a credible named author.
A useful analogy: AEO is turning up to the job interview. GEO is being the strongest candidate in the room.
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Week 1 — Foundation (AEO)
Add Article + FAQPage schema to all blog posts. Add LocalBusiness schema to homepage. Check robots.txt. Create llms.txt.
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Week 2 — Structure (AEO)
Rewrite page intros to answer the core question in the first paragraph. Add or rewrite H2/H3 headings to be descriptive, not clever. Add FAQ sections to key service pages.
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Week 3 — Credibility (GEO)
Add named author bios with credentials to all content. Link to authoritative third-party sources (gov.uk, industry bodies, trade associations). Add testimonials with full names.
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Week 4 — Specificity (GEO)
Replace generic claims with specific facts. "We've helped over 40 businesses" beats "we help small businesses." Add before/after examples, case study snippets, and named results.
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Ongoing — Freshness (GEO)
Publish at least one new piece of content per month. Update dateModified in schema when you refresh a page. Aim to have no page that is over 12 months old without a review.
See exactly where your site stands right now
The Growth Brothers AEO & GEO Readiness Checker scores your website across all the signals above — including schema markup, llms.txt, crawler access and content structure — in under 60 seconds.
Run the free check →Frequently Asked Questions
What is AEO (Answer Engine Optimisation)?
AEO is the practice of structuring your website content so that AI-powered answer engines — ChatGPT, Perplexity, Google AI Overviews, Bing Copilot — can accurately read, understand and cite your business in their responses. Key signals include direct answers in the first paragraph, FAQ sections, schema.org structured data, an llms.txt file, and open AI crawler access via robots.txt.
What is GEO (Generative Engine Optimisation)?
GEO is the discipline of keeping your content fresh, specific and credible enough that AI systems choose to cite you repeatedly. It builds on AEO by adding factual specificity, regular content updates, strong EEAT signals, and clear document structure that AI language models can parse cleanly.
Which AI search engines matter most for UK small businesses?
The four most relevant platforms are Google AI Overviews, ChatGPT, Perplexity AI and Bing Copilot. The same underlying signals — structured content, schema markup, EEAT and fresh content — drive visibility across all four, so a single optimisation effort benefits your ranking on all platforms simultaneously.
What is an llms.txt file and does my website need one?
An llms.txt file is a plain text file at yoursite.co.uk/llms.txt that tells AI crawlers what your business does, who you serve and what your most important pages are. It is the AI equivalent of a sitemap. While not yet a universal standard, Perplexity, Claude and other AI tools actively read llms.txt files. Adding one takes less than an hour and meaningfully improves your AI discoverability.
Do I need to block AI crawlers in my robots.txt?
No — if you want AI engines to cite your business, you should allow AI crawlers in your robots.txt. Common AI crawlers include GPTBot (OpenAI), PerplexityBot, ClaudeBot (Anthropic) and Googlebot. Check yoursite.co.uk/robots.txt now and confirm that AI crawlers are not blocked by a broad Disallow rule.
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