SEO, AEO and GEO: What is the Difference?

If you have been trying to understand the difference between SEO, AEO, and GEO, you are not alone. These three disciplines are closely related, often confused, and increasingly important for companies that want to be found in modern search environments.

This article gives you a clear breakdown of what each one means, how they work together, and where your company should focus first.

SEO: Search Engine Optimisation

SEO is the foundation. It is the practice of making your website technically strong, clearly structured, and relevant enough for search engines like Google to find, index, and rank it.

In practice, SEO work includes technical audits, keyword research, on-page optimisation, metadata, page speed, internal linking, and content structure. Together, these elements make your website easier for search engines to crawl, understand, and evaluate.

SEO has been around for decades and remains essential. However, search is changing, and SEO now has to support more than traditional rankings.

AEO: Answer Engine Optimisation

AEO is the practice of structuring your content so that AI platforms such as ChatGPT, Perplexity, Google AI Overviews, and Claude can understand it, trust it, and use it when answering questions.

It builds on the SEO foundation by adding structured data, entity signals, FAQ content, clear service descriptions, and authority markers that help AI systems interpret your company as a relevant source.

The difference is subtle but important. SEO helps your pages rank in search results. AEO helps your content become usable in AI-generated answers, summaries, and recommendations.

You can learn more about AEO in our dedicated article: What is AEO and why it matters for your business.

GEO: Generative Engine Optimisation

GEO is the newest of the three. It focuses on how your brand, content, and expertise appear in the outputs of generative AI systems: summaries, recommendations, comparisons, and direct answers produced by platforms such as ChatGPT, Perplexity, Claude, and Google AI Overviews.

While AEO focuses on content structure and answer readiness, GEO looks at the wider picture: how your company is represented across the web.

This includes third-party mentions, reviews, directories, case studies, press coverage, industry profiles, and the consistency of your company’s entity footprint.

In other words, GEO asks a simple question: when AI generates an answer about your industry, is your company part of that conversation?

How SEO, AEO, and GEO work together

SEO, AEO, and GEO are best understood as layers.

First, SEO makes your site findable and technically sound. Then, AEO makes your content clear, structured, and useful for AI-driven answers. Finally, GEO strengthens the external signals that help AI systems understand your brand as credible, relevant, and worth recommending.

A company with SEO alone may perform well in traditional Google search while still being absent from AI-generated answers.

However, a company that focuses on AEO without a strong SEO foundation may have structured content that search engines struggle to find or evaluate properly.

Likewise, a company that ignores GEO may struggle to build the external proof that AI systems look for when comparing providers.

The strongest digital presence combines all three.

Which one does your company need?

Most companies need all three, but the priority depends on where the gaps are.

If your site has weak technical foundations, broken structure, poor metadata, or thin content, start with SEO.

When your content is already strong but difficult for AI platforms to interpret, AEO should become the priority.

If your brand has limited external presence, few third-party mentions, and weak authority signals, GEO needs to be part of the strategy.

For companies in finance, fintech, logistics, SaaS, and professional services, all three are becoming increasingly relevant. Buyers are using AI to research, compare, and shortlist providers before they make contact.

As a result, if your company is missing from that research stage, you are missing from one of the most important moments in the buying process.

And then there is CRO

Visibility is only half the work. Once SEO, AEO, and GEO are bringing the right people to your site, Conversion Rate Optimisation determines how many of them take the next step.

CRO looks at what happens after people arrive: where they hesitate, where they leave, and what prevents them from becoming an enquiry, lead, or client.

Therefore, CRO connects search visibility to business results.

The companies that win in modern search are the ones that combine all four: SEO, AEO, GEO, and CRO.

Together, these disciplines make your company easier to find, easier to understand, easier to trust, and easier to contact.

How CM Marketing approaches this

At CM Marketing, we treat SEO, AEO, GEO, and CRO as one connected system.

Every project starts with understanding where your company stands across all four disciplines. From there, we build a focused strategy that addresses the gaps in the right order: technical structure, content clarity, AI visibility, external authority, and conversion.

The goal is simple: to make your company more visible where buyers are searching, more credible when they compare options, and more effective when they arrive on your site.

If you want to know where your biggest opportunities are, get in touch. We will show you what is missing, what needs fixing, and where to focus first.