Answer Engine Optimization (AEO)

Answer engine optimization (AEO) is the practice of making content and brand information the answer, or a cited source for the answer, when a system responds to a question directly instead of listing links. Answer surfaces include Google featured snippets and knowledge panels, voice assistants, and AI answer engines such as ChatGPT, Perplexity, Gemini and Google AI Overviews.

AEO is older than GEO. Jason Barnard, founder of Kalicube, says he coined the term in 2017, when Google's featured snippets and direct answers began replacing clicks to websites; Kalicube's account of the term traces it to a Trustpilot white paper launched at BrightonSEO in September 2017. The first independent write-up was a Search Engine Watch article by Rebecca Sentance on February 7, 2018, which reported Barnard and Trustpilot's Chee Lo explaining how voice search was turning search engines into answer engines. In that period, AEO meant answer boxes, featured snippets and spoken answers from Alexa, Google Assistant and Siri.

The meaning widened after ChatGPT, Perplexity and, from May 2024, Google AI Overviews made generated answers common. AEO now overlaps almost entirely with GEO. The practical differences are scope and audience. AEO still includes non-generative answer surfaces such as featured snippets, knowledge panels and voice responses, and it is the term many in-house marketing teams and tool vendors prefer. GEO, named in a 2023 research paper, is used more in technical and research contexts. Google treats them together: its May 2026 guide defines both terms and says that, for Google Search, optimizing for generative AI search is still SEO.

AEO work usually follows the same sequence:

• Map the questions customers ask, from support tickets, sales calls, People Also Ask boxes and prompt research.
• Answer each question directly near the top of a page, then add depth, evidence and sources.
• Make the brand's own facts unambiguous through a clear entity home, consistent descriptions and accurate business profiles.
• Earn corroboration from independent sources, since answer engines prefer claims they can confirm in more than one place.

A note on the acronym: AEO is also used for agent experience optimization, which is about making a site usable by AI agents rather than being the answer. When a vendor or job posting says AEO, check which one is meant.

AEO is measured by how often a brand or page supplies the answer for a defined question set: featured snippet ownership in classic search, and mention rate, answer position and citations in AI answers. Because one answer usually names only a few sources, the share of answers you appear in matters more than average rank. Our explainer on what AEO is and the comparison of platforms for AEO cover tools and workflows.