What is AEO? Answer engine optimization in plain words

AEO stands for answer engine optimization. An answer engine is any tool that replies to a question with a written answer instead of a list of links: ChatGPT, Gemini, Perplexity, Microsoft Copilot, and Google's AI Overviews and AI Mode. AEO is the work of making those answers name your brand and cite your pages when your buyers ask.

About 4,700 people a month in the US search "what is aeo", and about 7,300 search "answer engine optimization" (Ahrefs, read 2026-11-12). The term "aeo" alone gets far more, but most of those searches are for a clothing retailer, which is worth knowing before you put the acronym in a headline.

What counts as an answer engine

Anything that answers in sentences and decides which brands and sources to mention. See answer engine for the list and how each one finds its sources. What they share: most search the web before answering, so the pages they find decide the brands they name.

What you measure

AEO is measured on questions, not keywords. For each question a buyer might ask, you count three things across many answers:

• Named: the share of answers that mention your brand.
• Named first: the share that mention you before any rival.
• Cited: the share that link to one of your pages.

Questions differ in how much they matter, so they're grouped into tiers: buying questions count most. Because answers vary from one ask to the next, each number comes with a noise band, and the whole thing adds up to your AI visibility. Doing this every week, on a fixed set of questions, is prompt tracking.

The work, in order

When a question leaves you out, the fix is one of four things, tried in this order: correct a fact the answers get wrong; improve a page the assistants already read; write a new page for the exact question; get onto the third-party pages the assistants cite. Our guide to getting named in ChatGPT explains why that order works.

AEO, SEO and GEO

GEO, generative engine optimization, is the same job under another name. SEO is related but different: it earns a ranking, where AEO earns a place inside the answer. The pages that rank still matter, because assistants search before they answer. AEO vs SEO vs GEO sets out what carries over and what's new.

Who writes about it

On Google, the AI Overview for "what is aeo" cited Reddit, Salesforce, Coursera, HubSpot and Profound's own explainer, among others, on 2026-11-12. This glossary is our version: each term in plain words, with where it shows up in Keats.