SEO vs AEO vs GEO: what each term means and how they fit together

By the SEOCells team, OmCells R&D Labs LLP · Published 1 November 2026

SEO (search engine optimisation) aims for high positions in search results. AEO (answer engine optimisation) aims to be quoted in AI answers. GEO (generative engine optimisation) is a research term from 2023 for the same goal in AI-written answers. AI SEO usually means SEO done with AI tools, or for AI search. One sound strategy covers all four.

What are the full forms of SEO, AEO and GEO?

The terms at a glance
Term	Full form	In one line
SEO	Search engine optimisation	Earn high positions in Google and Bing results.
AEO	Answer engine optimisation	Be the source an AI assistant or AI Overview quotes.
GEO	Generative engine optimisation	Be visible inside answers written by generative AI; named in a 2023 research paper.
AI SEO	AI search engine optimisation	Used two ways: SEO done with AI tools, or optimising for AI search. Ask which one is meant.
LLM SEO / LLMO	Large language model optimisation	Another name for AEO/GEO, focused on chat assistants.

Where does GEO come from?

GEO was introduced by a research team (Aggarwal et al.) in a paper first posted in November 2023 and published at the KDD 2024 conference. They defined “generative engines” as search systems that write an answer from several sources, proposed ways to measure a source's visibility inside such answers, and built a benchmark of queries to test content changes.

In practice, marketers now use GEO and AEO almost interchangeably. Some use AEO for answers in assistants and featured results, and GEO for generative AI search specifically. The work you would do is largely the same.

What is the difference between AEO and GEO?

The difference is mostly history and emphasis. AEO grew out of featured snippets and voice search, so it stresses short, direct answers to questions. GEO came from AI research, so it stresses how content is chosen and blended inside a generated answer and how to measure that visibility. For a business, both lead to the same checklist: be crawlable, answer clearly, show evidence, be consistent and be mentioned by others.

Does AI search replace SEO?

Not according to the search engines themselves. Google says AI Overviews and AI Mode show links from its normal index, need no special optimisation, and that SEO best practices still apply. Microsoft Copilot draws on the Bing index. Assistants that browse the web retrieve pages through search systems first. Good SEO is the entry ticket; AEO and GEO decide how well your pages do once they are in the room.

How do you plan one strategy for SEO, AEO and GEO?

Start from customer questions, not keywords alone: what people ask Google and what they ask assistants are often the same question in longer form.
Fix access first: crawl rules, indexing, speed and pages that render without scripts.
Write pages that answer one main question each, with the answer at the top and the detail below.
Make facts easy to lift: names, prices or price ranges, dates, places, steps and short comparisons.
Describe your business in structured data and keep it identical across your site and profiles.
Build reputation off your site: reviews on independent platforms, industry listings and press.
Measure both worlds: rankings and clicks for SEO; citation rate and AI visits for AEO/GEO.

How does SEOCells cover SEO, AEO and GEO?

SEOCells has a free SEO Score and a free AEO Score for a quick reading of one page, an SEO Report that compares your page with the pages that outrank it, and an AEO Report that samples real AI answers and scores your visibility in them with ranges. GEO is covered by the AEO Report, because it measures the same outcome: being chosen and used inside AI-written answers.

Questions answered

What is the full form of GEO in SEO?

GEO stands for generative engine optimisation: improving how visible a source is inside answers written by generative AI search systems. The term comes from a 2023 research paper published at KDD 2024.

Are AEO and GEO the same?

Nearly. AEO grew out of featured snippets and voice answers; GEO out of AI research on generative search. Both aim to make your content the source an AI answer uses, and the practical work overlaps almost completely.

What is AI SEO?

AI SEO is used in two ways: SEO done with the help of AI tools, or optimising a website for AI search and assistants. When someone offers “AI SEO”, ask which of the two they mean.

Sources

Search engines and AI assistants change often; check the linked documentation for the latest details. Nothing in this guide is a promise of rankings, citations or results.

Check one page for both Google and AI answers — the first SEO Score and AEO Score are free.

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