AEO vs SEO vs GEO vs LLMO: A UK SMB Decision Map

If you run a UK small business, four acronyms keep landing in your inbox from agencies: AEO, SEO, GEO and LLMO. They sound like competing products. They are mostly the same work wearing different labels, aimed at slightly different surfaces. This guide maps what each one means, where they overlap, and which to fund first, with the underlying numbers tied to named sources you can check.

What is AEO (answer engine optimisation)?

Classic search hands back ten blue links and lets the visitor choose. An answer engine, whether that is Google's AI Overview, a voice assistant, or a chat tool, reads the page and returns one composed answer. AEO is the work that makes your page the easy, safe thing for that engine to quote. In practice it means putting a short direct answer at the top of each section, using plain question-style headings, marking up facts with structured data, and keeping business details consistent everywhere they appear. For UK firms it overlaps heavily with local search and reviews, which is why the hub page on AI visibility treats them as one connected programme.

How does AEO differ from SEO?

The mechanics still rhyme. Both want crawlable pages, fast loading, clear topic focus and trustworthy signals. The divergence is in the target. SEO success is a higher position and a click. AEO success is a correct, attributed mention inside an answer the user may never click past. That changes how you write: shorter, self-contained answers, explicit questions as headings, and facts a model can verify against other sources. It also changes failure modes. An SEO page can rank and still be ignored by an AI Overview if its answer is buried three paragraphs down. If you are still building the SEO base, the Google AI Overviews ranking guide covers where the two disciplines meet.

What are GEO and LLMO, and are they the same thing?

Think of three concentric circles. AEO is the outer ring covering any engine that returns an answer, including voice and Google AI Overviews. GEO is the middle ring covering generative chat tools that synthesise from multiple pages. LLMO is the inner ring, concerned with a named model's representation of you. The tasks barely change between rings: clear answers, structured data, trustworthy citations, and a clean machine-readable summary such as an llms.txt file. The llms.txt implementation guide for UK SMBs walks through that last piece. Treat the three as one body of work with three places to test, not three invoices.

How big is AI search in the UK right now?

This is the part that decides whether AEO is worth your time. According to Ofcom's 2025 Online Nation research, 54 percent of UK adults now use AI tools such as ChatGPT, Copilot or Gemini, a behaviour led by younger adults but no longer fringe. On the search side, Google says its AI Overviews now reach two billion monthly users↗ across more than 200 countries and territories, with its Gemini app at 450 million monthly users. Google's own AI Overviews expansion update↗ adds that the feature drives over a 10 percent increase in usage for the query types where it appears, in more than 40 languages.

Which one should a UK small business start with?

The sequence that works for most local UK firms is unglamorous. First, claim and verify your Google Business Profile and make every detail accurate, as covered in the Business Profile setup and verification guide. Second, build clear service pages that answer the real questions customers ask. Third, earn a steady flow of honest reviews. Only then does the AEO polish, question headings, concise answers and structured data, have something solid to amplify. Reverse the order and you are optimising answers that no engine trusts enough to repeat.

What does an AEO-ready page actually look like?

Concretely: a heading phrased as the question a customer types, then one or two sentences that fully answer it before any preamble, then the detail. Add FAQ and organisation structured data so prices, areas and hours are machine-readable. Keep your name, address and phone number identical across your site, profile and directories, because a model that sees three versions trusts none. Include a plain summary file for crawlers. None of this is exotic, and the guide to getting cited by ChatGPT shows the same pattern applied to chat tools specifically.

How do you measure AEO when there are no rankings?

Build a small spreadsheet: one row per question and engine, columns for mentioned yes or no, accuracy, and any correction needed. Re-run it monthly. Watch analytics for referral traffic from AI tools and for branded search lift, which often rises before direct AI referrals show up. The discipline matters more than the tooling. A founder spending twenty minutes a month checking ten questions across four engines learns more about their AI visibility than most dashboards reveal.

What does AEO cost a UK SMB, and which channel wins for which goal?

Here is the decision map in plain terms. If your goal is capturing someone ready to book a plumber or salon appointment now, local SEO and a strong profile do the heavy lifting, as the local SEO guide for UK trades lays out. If your goal is being on the shortlist when a customer asks an AI tool "who is good for X near me", AEO and GEO matter most, and they draw on the same reputation base. Paid search buys instant presence but stops the moment you stop paying. The honest trade-off: AEO compounds slowly and cheaply, paid is fast and rented, and the foundations underpin all of it. Most UK SMBs are best served funding the foundation, layering AEO on top, and using paid only to fill gaps while the organic base matures.

The four acronyms are not four budgets. They are one programme, clear answers, clean data and earned trust, tested across a few different engines. Get the foundation right, add the answer layer, and measure correct mentions over time. That is the whole map.