SEO vs AEO vs GEO: What They Mean for UK Businesses

Three Related Disciplines, Not One

SEO, AEO and GEO get used almost interchangeably in conversation, as if they're three names for the same job. They aren't. Each one optimises for a different outcome, on a different platform, and a website built for one of them doesn't automatically succeed at the others.

SEO is the practice of ranking in traditional search results. AEO, answer engine optimisation, is about being the answer a voice assistant or featured snippet reads aloud. GEO, generative engine optimisation, is about being cited by AI tools such as ChatGPT or Google's AI Overviews. All three matter, and none replaces the others.

The confusion is understandable. All three sit under the umbrella of "getting found online," and the same underlying content often serves all three purposes at once. But the platforms reading that content work in fundamentally different ways, and a business that only understands one of the three is optimising for a shrinking slice of how customers actually find businesses today.

SEO: Ranking in the Results You Already Know

Search engine optimisation is the established discipline: the practice of ranking as high as possible in Google's organic results for the terms your customers search. It covers keyword targeting, page speed, backlink authority, technical health, and content depth — the factors Google's own ranking systems have weighed for years.

SEO still drives a substantial share of website traffic for most businesses, and nothing about AEO or GEO changes that. A plumber ranking first for "emergency plumber Leeds" still gets the click. An accountant ranking on page one for "corporation tax advice Bristol" still gets the enquiry. The mechanics of that competition — content quality, site structure, authoritative links — haven't gone away.

What has changed is what happens above those results. Google increasingly answers a query directly, in a box, before the ranked list even appears. Ranking first no longer guarantees you're the thing the searcher actually reads. That's the gap AEO exists to close.

AEO: Being the Answer, Not Just a Result

Answer engine optimisation targets the direct-answer surfaces: featured snippets, Google's "People Also Ask" boxes, and voice assistants like Siri or Alexa reading a single answer aloud. These surfaces don't rank ten links — they pick one source and present its answer as the answer, with no click required.

Winning that spot means structuring content so a machine can lift a self-contained answer straight out of it. A clear question posed as a heading, followed immediately by a direct, factual answer in the first sentence or two, is far more likely to be extracted than an answer buried three paragraphs into a rambling explanation. The content still needs to satisfy a human reader afterwards — but the opening has to work as a standalone answer first.

This is a different skill from traditional SEO copywriting, which often builds up to a conclusion. AEO rewards stating the conclusion first. A business whose content is written to build suspense before delivering the answer is writing for readers, not for the answer engines increasingly standing between a searcher and that content.

GEO: Being Cited by Generative AI Tools

Generative engine optimisation is the newest of the three, and the one businesses understand least. Tools like ChatGPT, Perplexity, and Google's AI Overviews don't return a ranked list of links at all. They read across multiple sources, synthesise an answer, and — sometimes — cite the sources they drew from.

Being cited there isn't about outranking competitors for a keyword. It's about being a source the model trusts enough to draw from and reference by name. That favours content that states facts plainly and consistently, uses clear structure the model can parse, and appears across enough of the web that the same claims corroborate each other. A page stuffed with vague marketing language gives a generative model nothing concrete to lift and attribute.

This is also the discipline businesses have the least direct control over, since these tools don't publish a ranking algorithm to optimise against the way Google does. What a business can control is making sure its own site states its services, pricing approach, and expertise as clear, unambiguous fact — the same discipline that improves AEO also improves how well a generative model can summarise the business accurately.

What This Means for Your Website

SEO isn't dead, but it's not enough on its own anymore. A business optimising purely for search rankings is ignoring the growing share of queries that never reach a ranked list at all — answered directly by a snippet, a voice assistant, or a generative AI summary instead.

The practical response isn't three separate strategies. It's one website built with clear structure, direct answers, and unambiguous factual content throughout — the same foundation serves search rankings, answer engines, and generative AI citations simultaneously. What changes is the discipline of writing for extraction, not just for ranking.

Most business websites weren't built with any of this in mind, let alone all three. A managed website service that treats content structure and technical foundation as ongoing work, rather than a one-off build, is what keeps a site competitive as these platforms keep evolving.

Series: AI Search, AEO & GEO

Google's AI Overviews, ChatGPT, and Perplexity now answer customer questions directly, often without a click through to a website at all. This series covers what that shift means, how to check whether a site is actually ready for it, and what SEO, AEO, and GEO each do differently now that ranking well no longer guarantees being the answer AI tools reach for.

• Part 1: AI Search Is Changing How Customers Find Your Business
• Part 2: The Five-Minute AI Readiness Check For Your Website
• Part 3: SEO vs AEO vs GEO: What They Mean for UK Businesses