If you've been looking into getting your business visible on AI search tools, you've probably seen two terms thrown around: AEO and GEO. They sound different but they're talking about the same thing. The industry just couldn't agree on a name. Here's what happened, and why GEO is the one that stuck.
What AEO stood for
AEO stands for AI Engine Optimization. It was one of the first terms people used when they realised that AI tools like ChatGPT and Perplexity were becoming a new way for customers to find businesses.
The logic was simple. We had SEO for search engines. Now we have AI engines. So AI Engine Optimization made sense as a name. Several early agencies and marketers started using AEO in their content throughout 2024 and into early 2025.
There was just one problem. AEO already meant something else.
The naming conflict
In SEO circles, AEO had been used for years to mean "Answer Engine Optimization." That was the practice of optimising your content to appear in Google's featured snippets and knowledge panels. The "answer box" at the top of Google results.
So when people started using AEO for AI optimization too, it created confusion. Were you talking about getting into Google's answer box? Or getting recommended by ChatGPT? Two completely different strategies sharing the same acronym.
The industry needed a clearer term. That's where GEO came in.
Why GEO won out
GEO stands for Generative Engine Optimization. The "generative" part refers to how these AI tools actually work. They don't just search a database and return links like Google does. They generate original responses by synthesising information from across the web.
The term was formalised by researchers at Princeton, Georgia Tech, the Allen Institute for AI, and IIT Delhi in a landmark paper published in late 2023. They defined GEO as the practice of optimising content to improve visibility in responses from generative engines. That academic backing gave it weight.
By mid 2025, GEO had become the dominant term. Major marketing publications, agency websites, and industry conferences all settled on it. AEO (in the AI sense) quietly faded from use.
It's not just a name change
The shift from AEO to GEO wasn't purely cosmetic. It reflected a better understanding of what we're actually optimising for.
"AI Engine" suggests there's one engine to optimise for, like there was one Google. But the reality is messier than that. ChatGPT, Claude, Perplexity, Gemini, and Copilot all work differently. They pull from different data sources. They weight signals differently. They update at different speeds.
"Generative Engine" captures this better. You're not optimising for a single AI tool. You're optimising for the way all generative AI tools process and present information. The underlying approach is the same even though the specific tools differ.
What GEO actually involves
Whether you called it AEO or GEO, the practical work is the same. It's about making your business visible and recommendable to AI powered search tools.
The core tactics haven't changed with the name. 68% of AI citations come from third party sources like review sites, directories, and news articles. So the work is about building that web of trusted mentions across the internet, not just tweaking your website.
Press releases, directory listings, reviews, structured content, and making sure AI crawlers can actually read your site. That's GEO in practice. We've covered the full breakdown in our guide on what Generative Engine Optimization actually means.
You might still see both terms
Some agencies and blog posts still use AEO when talking about AI visibility. That's fine. They mean the same thing in this context. If you see someone offering "AEO services" they're doing GEO work under a different label.
But if you're searching for information or comparing providers, use GEO as your search term. You'll find more current, more relevant results. Most of the serious players have moved to GEO.
And if someone tells you AEO and GEO are different services? Be cautious. They're not. One is just the older name for the other.
Why does any of this matter for your business?
It doesn't, really. The name debate is an industry thing. What matters for you is the outcome: when a potential customer asks ChatGPT, Claude, or Perplexity for a recommendation, does your business come up?
64% of consumers now use AI tools to discover businesses. That number is growing every month. Whether you call it AEO or GEO, the businesses that invest in AI visibility now are the ones that will dominate their local recommendations for years.
The best part? Most of your competitors haven't even heard of GEO yet. That's your window. The first businesses to build their AI presence get recommended by default, and once an AI consistently associates your name with your trade and location, it's very hard for competitors to displace you.
What to do next
Try it yourself. Open ChatGPT or Perplexity and type "recommend a [your trade] in [your town]." If your business doesn't appear, you've got work to do. If your competitor appears, you've got work to do urgently.
FastGEO helps small businesses and tradespeople get visible on AI search tools, starting at £150. No jargon, no long contracts, no five figure monthly retainers. Just practical work that gets you recommended. Get in touch and we'll show you exactly where you stand.