SEO, AEO & GEO
The Real Difference Between SEO, AEO and GEO (And Why It Matters Now)
Three acronyms, three very different jobs. If your search strategy still only covers one of them, you're already invisible in two channels your customers use every day.
Brilliant Brains · Aug 05, 2026 · 7 min read
Search used to mean one thing: rank on Google. Now a customer researching your category might type a query into Google, ask ChatGPT for a recommendation, or get a summarised answer straight from an AI overview without clicking anything at all. Each of those is a different game, with different rules.
SEO — being findable
Classic search engine optimisation is still the foundation: technical health, page structure, backlinks, and content that answers the query better than the next ten results. It gets you the click.
AEO — being the answer
Answer engine optimisation is about winning the featured snippet, the voice assistant reply, the zero-click summary. The content has to be structured so a machine can lift a clean, correct answer out of it in one pass — clear headers, direct answers up top, defined terms, no fluff before the point.
GEO — being the source
Generative engine optimisation is the newest and least understood: getting cited, quoted or recommended by ChatGPT, Perplexity, and Google's AI mode when someone asks a question in your category. These systems don't crawl and rank in real time the way search engines do — they favour clear, well-attributed, frequently-corroborated information from sources they already trust.
- SEO wins the click. AEO wins the snippet. GEO wins the recommendation.
- A page can rank #1 on Google and still never get mentioned by an AI answer engine.
- The content patterns that win each one overlap, but the priority order is different.
If your last search audit only mentions rankings, it's already answering last year's question.
What to actually do about it
Start by finding out where you already show up — run the actual questions your buyers ask through ChatGPT and Perplexity, not just Google Search Console. The gaps you find there are usually bigger, and cheaper to close, than the next ten keywords on your SEO list.
