Three abbreviations keep appearing in digital marketing conversations right now — SEO, AEO and GEO — and they’re often used interchangeably or without much explanation. That’s worth fixing, because they describe genuinely different things, and treating them as synonyms leads to muddled priorities. Here’s what each one actually means and, more usefully, what you should be doing about it if you run a UK SME.
SEO: Still the Foundation
Search Engine Optimisation is the original discipline. It’s about making your website rank well in Google’s (and Bing’s) traditional search results — the blue links. That means technical site health, relevant and well-structured content, credible backlinks and a decent user experience. None of that has gone away.
For most UK SMEs, organic search is still a primary acquisition channel. Someone searches “commercial electrician Bristol” or “accountant for contractors Manchester” and you either appear or you don’t. SEO is what determines that. It’s also the slowest of the three disciplines to show results and the most competitive in established categories, but it compounds over time in a way that paid channels don’t.
The practical work behind SEO includes keyword research tied to commercial intent, on-page structure (titles, headings, meta descriptions), page speed and Core Web Vitals, internal linking, and earning or building links from relevant external sites. None of this is glamorous, but it is the bedrock everything else sits on.
AEO: Structuring Content for AI-Generated Answers
Answer Engine Optimisation emerged as Google started providing direct answers at the top of search results — featured snippets, People Also Ask boxes, knowledge panels. AEO is the practice of structuring your content so that these systems pull from your site rather than a competitor’s.
The key shift with AEO is that the goal isn’t just a ranking position; it’s being the source that gets cited when Google (or another engine) synthesises an answer. That requires writing content that actually answers specific questions clearly and concisely, using structured data markup (schema.org) so search engines understand what your content is about, and organising pages so the answer to a question appears in a predictable, parseable format.
A practical example: if you’re an HR consultancy and someone searches “what is the minimum notice period for redundancy in the UK,” a well-structured page that answers that question plainly — with the statutory minimums stated clearly near the top — is far more likely to appear as a featured snippet than a 2,000-word article that buries the answer in paragraph six. AEO is largely a discipline of clarity and structure applied to content you should be producing anyway.
For UK SMEs, AEO matters most if your customers are searching informational queries before they buy — which is most B2B categories and many B2C ones. It also matters because AEO and GEO increasingly overlap: the same structural habits that help you appear in Google’s AI Overviews also help you get cited by tools like ChatGPT and Perplexity.
GEO: Being Present in AI-Generated Responses
Generative Engine Optimisation is the newest of the three and the least standardised in terms of established practice. GEO refers to making your business visible and credible within the responses generated by large language model-based tools — ChatGPT, Google Gemini, Perplexity, Microsoft Copilot and others.
When someone asks Perplexity “what’s a good accountancy firm for UK startups” or prompts ChatGPT for a comparison of project management tools, these systems draw on publicly available information: your website content, third-party mentions, review sites, directory listings, published articles, and so on. GEO is about ensuring that the information ecosystem around your business is accurate, substantial and consistent enough that AI systems can confidently surface you.
That sounds abstract, so here’s what it means in practice. If your website clearly explains what you do, who you serve and where you operate — if your Google Business Profile is accurate and maintained, if you have credible third-party coverage (press mentions, professional directory listings, review volume on relevant platforms) — you are already doing meaningful GEO. If your web presence is thin or inconsistent, AI tools will either omit you or represent you inaccurately.
GEO also involves thinking about entity clarity: does the internet clearly understand that your business is a specific named entity with a defined category, location and specialism? This matters because generative AI systems reason about entities, not just keywords. An agency that has never clearly stated its services, its location or its client type across multiple credible sources is harder for any AI to confidently recommend.
How the Three Overlap — and Where They Diverge
The honest answer is that good SEO and AEO practice creates a solid GEO foundation. Well-structured, clearly written content that answers real questions, published on a technically sound website with coherent external signals, is exactly what both traditional search engines and generative AI systems are trying to surface. The disciplines aren’t in competition.
Where they diverge is in emphasis and measurement. SEO is measurable through rankings and organic traffic. AEO success shows up in featured snippet appearances and structured result visibility. GEO is currently harder to measure directly — there’s no widely used equivalent of Google Search Console that tells you how often ChatGPT mentions your business. That makes it feel less concrete, but it doesn’t make it less real.
The other divergence is in the type of content each rewards. SEO still responds well to comprehensive, authoritative long-form content optimised around keyword clusters. AEO rewards concise, structured, question-answering content. GEO rewards breadth of credible presence — your business being accurately described in many places, not just your own site.
Priority Order for UK SMEs
If you’re working with a limited budget and limited time, here’s a sensible sequence.
Start with SEO. If your site isn’t technically sound, isn’t indexed properly, has no meaningful content and has no inbound links, nothing else matters yet. Fix the foundation first. This isn’t optional.
Build AEO into your content as you go. Once you’re producing content, make it structured and question-oriented from the outset. It costs very little extra effort to write clearly, format answers well, and add schema markup. Do this in parallel with SEO rather than treating it as a separate project.
Treat GEO as an ongoing hygiene discipline. Make sure your business information is accurate and consistent across Google Business Profile, Companies House, industry directories, Trustpilot or equivalent review platforms, and any trade press or third-party sites that cover your sector. Ensure your own website clearly states what you do, where, and for whom. This isn’t a campaign — it’s maintenance.
The businesses that will get the most from GEO in the near term are those in categories where people are actively using AI tools for research: professional services, software, specialist suppliers, consultancies. If your customers are asking ChatGPT or Perplexity for recommendations in your category, being a clearly defined, credible entity with a good information footprint is worth prioritising now. If your customers search Google Maps for a local tradesperson, GEO is a lower priority than a clean Google Business Profile and local SEO.
What Good Practice Looks Like Across All Three
Rather than running three separate workstreams, most SMEs are better served by a content and presence strategy that addresses all three by default. That means:
- A technically sound, fast-loading website with a clear site structure and proper indexing
- Content that explains your services, answers the questions your customers actually ask, and is written in plain English rather than jargon
- Schema markup applied to key page types — business information, articles, FAQs, products or services as appropriate
- Consistent, accurate business information across all external platforms your customers use
- A deliberate effort to earn credible third-party mentions — trade press, industry directories, partner websites, review platforms
None of this is revolutionary. Most of it is just good digital housekeeping applied with a clear understanding of why it matters. The difference between businesses that rank well, appear in AI answers and get recommended by generative tools — and those that don’t — is usually less about clever tactics and more about whether they’ve consistently done the basics well.
The Terminology Will Keep Shifting
It’s worth being honest about the fact that GEO in particular is a developing discipline. The tools are changing, the ranking signals for generative AI are not fully understood publicly, and best practice will evolve. What won’t change is the underlying logic: be a clearly defined, credible, well-documented business with genuinely useful content, and the various systems that match queries to businesses will be better able to surface you.
SEO isn’t dead. AEO is a natural extension of writing clearly. GEO is a new lens on an old question — how does your business show up when someone who doesn’t know you is looking for what you do? The abbreviations are less important than having a coherent answer to that question.
Frequently Asked Questions
What is the difference between SEO, AEO and GEO?
SEO (Search Engine Optimisation) focuses on ranking in traditional search results. AEO (Answer Engine Optimisation) focuses on structuring content so it gets cited in direct answer features like featured snippets. GEO (Generative Engine Optimisation) focuses on ensuring your business is accurately and credibly represented in responses from AI tools like ChatGPT, Gemini and Perplexity.
Do UK SMEs need to worry about GEO yet?
It depends on the category. Businesses in professional services, software or specialist B2B sectors — where buyers are already using AI tools to research options — should be paying attention now. For businesses relying primarily on local search or Google Maps, strong local SEO and a clean Google Business Profile remain the higher priority.
Is GEO the same as AEO?
They overlap but aren’t identical. AEO is specifically about appearing in structured answer features within search engines. GEO is broader — it encompasses being present and credible across the generative AI tools that may not operate through traditional search at all. Good AEO practice (clear, structured, question-answering content) does support GEO, but GEO also requires a credible external information footprint beyond your own website.
Where should a UK SME start if they have a limited budget?
Start with technical SEO and basic on-page content. Build AEO habits into your content process from the beginning — it doesn’t cost much extra. Address GEO as a hygiene discipline by keeping your business information consistent and accurate across all major external platforms. Don’t try to run three separate campaigns; a coherent content and presence strategy covers most of the ground across all three.