SEO gets your pages to rank in the traditional list of search results. AEO structures your content so an answer engine can lift a clear, direct answer from it. GEO builds the authority that makes a generative AI cite or recommend your business. They are not competing choices. SEO is the foundation, and AEO and GEO are the layers that carry you into AI search.

Three acronyms now describe how businesses get found online, and they are easy to muddle. Here is what each one means in plain English, how they differ, and which your business actually needs.

What is SEO?

SEO, or search engine optimisation, is the original discipline. It is the work of getting your website to rank in the standard list of results on Google, so people click through to you. It relies on the right keywords, useful content, a technically healthy site, and links from other reputable sites. SEO has been the backbone of online visibility for two decades, and it still matters, because pages that rank well are more likely to feed everything above them.

What is AEO?

AEO, or answer engine optimisation, focuses on being the answer rather than a link. When a search or AI tool tries to answer a question directly, in a snippet or an AI answer box, AEO is what makes your content the piece it pulls from. In practice that means writing clear, direct answers to real questions, structuring content so it is easy to extract, and using schema to spell out what your content covers. If SEO wins the click, AEO wins the answer.

What is GEO?

GEO, or generative engine optimisation, is the newest of the three. It is about getting your business cited or recommended when a generative AI, such as ChatGPT, Gemini or Google AI Mode, writes an answer from scratch. These tools do not just rank pages, they weigh up who is credible and name a few. GEO builds that credibility through genuine authority, a consistent presence across the web, third party mentions and reviews, and fresh, in depth content. If AEO wins the answer, GEO wins the recommendation.

How do they fit together?

Think of them as layers on the same foundation, not rivals. SEO makes you findable and feeds the machines good material. AEO makes your content easy to lift. GEO makes your business the one the AI trusts enough to name. The table below sums it up.

Which one does your business need?

All three, in that order. Start with solid SEO, because it is the foundation everything else draws on and it still drives real traffic. Layer AEO on top so your content is structured to be lifted as the answer. Then build GEO so generative tools recommend you by name. The direction of travel makes the case: Google says AI Overviews now appear on roughly half of searches in the US, and Seer Interactive found that brands cited in those answers earn far more clicks than uncited ones. Being ranked is no longer enough. You want to be ranked, lifted and recommended.

Related reading: What AI search optimisation means for Queensland businesses and our 2026 guide to generative engine optimisation.

Sources

AI Overviews prevalence, Google disclosures, 2026 (US figure). Citation click advantage, Seer Interactive, 2026.