You've heard of SEO. You might have heard of AEO. GEO is newer. And if someone's thrown all three at you in the same conversation, you'd be forgiven for wondering whether the alphabet soup is doing any actual work.

It is. Each one is distinct, each one matters, and together they cover the full landscape of how your business gets found in 2026. Let's sort them out properly.

SEO — Search Engine Optimisation

SEO is the one you know. It's the practice of making your website rank higher on Google and other traditional search engines, driving organic traffic that costs nothing per click and compounds over time.

SEO is about keywords, technical health, backlinks, content quality and a hundred other signals that Google uses to decide which pages deserve to appear where. Get it right and your website shows up when people search for the things you do. Get it wrong and you don't.

SEO is the foundation. AEO and GEO build on top of it. You can't skip this one.

What it gets you: rankings in Google and Bing search results, sustained organic traffic, long-term visibility.
How you measure it: keyword rankings, organic sessions, click-through rates.

AEO — Answer Engine Optimisation

AEO is SEO's evolution for the age of AI answers. Instead of optimising to rank in a list of results, you're optimising to become the direct answer that appears before those results, or the response spoken by Siri, or the snippet read out by Alexa, or the AI Overview at the top of the Google page.

The fundamental shift is this: SEO asks "how do I get on the list?" AEO asks "how do I become the answer?"

This requires structuring content around specific questions, writing in natural conversational language, adding FAQ sections with proper schema markup, and implementing structured data that tells AI systems exactly what your content is answering.

What it gets you: featured snippets, voice search results, Google AI Overview appearances, zero-click visibility.
How you measure it: featured snippet captures, voice search appearances, share of AI Overview mentions.

GEO — Generative Engine Optimisation

GEO is the newest discipline and the one most businesses haven't started thinking about yet. It's the practice of making your business authoritative enough that AI language models; ChatGPT, Google Gemini, Perplexity, Microsoft Copilot, will cite you, recommend you and name you when generating responses.

When someone asks ChatGPT to recommend a web design agency, GEO is what determines whether your name appears. When someone asks Gemini which tools are best for small business SEO, GEO is what gets your content cited.

GEO is about building topical authority, ensuring entity consistency across the web and creating genuinely citable content that AI systems trust enough to draw from.

What it gets you: brand mentions in AI-generated responses, citations in ChatGPT and Gemini, AI-era authority.
How you measure it: brand mentions in AI responses, citation frequency, entity recognition.

"SEO gets you on the list. AEO gets you read out. GEO gets you recommended. Together, they mean you're found everywhere that matters."

How they work together

They're not competing priorities. They're complementary layers.

Think of it as a stack:

  • SEO is the foundation, technical health, content quality, authority
  • AEO builds on SEO, adds question-focused structure, schema markup, conversational content
  • GEO builds on both, adds entity consistency, topical authority, citation-worthy content

Improve your SEO and you're setting up AEO to work. Improve your AEO and you're setting up GEO to work. The investments compound across all three.

Where to start

If you have nothing in place: start with SEO. Get the technical foundations right, build some quality content, establish your domain authority.

If your SEO is reasonably healthy: add AEO. It's the fastest route to new visibility; featured snippets and voice search can move within weeks of structural changes.

If both are in place: invest in GEO. It's the longest game but increasingly the most valuable; AI-generated recommendations are becoming how a significant portion of purchase decisions start.