Definition
Also written: GEO
No agreed definition
Generative engine optimization is the practice of improving how a source is used by AI systems that synthesise answers rather than list links. The term comes from a 2023 academic paper (arXiv:2311.09735, later accepted at KDD 2024) that measured how often a document’s content was reflected in a generated answer.
The widely-quoted "up to 40% visibility increase" from that paper is narrower than it sounds. It measures a position-adjusted share of the answer’s word count among five documents already retrieved into the model’s context — not whether you get retrieved at all, and not clicks or revenue. A 2026 critical survey (arXiv:2607.14035) documents this misreading directly.
The techniques with real support are unglamorous: include genuine statistics, cite sources, quote named entities. In the 54-method C-SEO Bench benchmark (NeurIPS 2025), only 3 methods produced a statistically significant positive effect, and gains erode as competitors adopt the same tactic.
The usual error
Where this goes wrong in practice
Buying GEO as a distinct service that bypasses search fundamentals. A page has to be indexable and snippet-eligible in ordinary Search before it is eligible for AI surfaces at all — Google has said so explicitly.
Related terms
Answer engine optimization (AEO)
Answer engine optimization is structuring content so a direct answer can be lifted cleanly into a featured snippet, a People Also Ask entry, a voice response or an AI summary. It predates the current AI wave — the original concern was voice assistants — and overlaps heavily with both SEO and GEO.
DefinitionAI Overviews
AI Overviews are Google-generated summaries shown above traditional results for some queries, assembled from pages in the ordinary search index and shown with links to the sources used. Eligibility requires that a page is already indexable and snippet-eligible in normal Search.
DefinitionRetrieval-augmented generation (RAG)
Retrieval-augmented generation is an architecture where a language model answers using documents fetched at query time rather than relying only on training data. The system splits sources into chunks, embeds and ranks them, places the best matches into the model’s context, and generates an answer from those.
DefinitionSearch engine optimization (SEO)
Search engine optimization is the practice of making a site easier for search engines to crawl, index, understand and rank, so that pages appear for queries the business can actually serve. It covers technical access, information architecture, content quality, internal linking, authority signals and the measurement that tells you which of those moved.
DefinitionAgentic workflow
An agentic workflow is an automation where a language model completes several connected steps toward a goal — researching, classifying, drafting, routing, reporting — deciding the order within defined rules, rather than executing a fixed script. Human approval points are part of the design, not an afterthought.
DefinitionLLMO, AISO and GSO
LLMO, AISO and GSO are vendor terms for largely the same work as GEO and AEO: making content that AI systems can read, trust and reference accurately. No academic or platform-official definition separates them, and industry sources contradict each other on where the boundaries fall.
Definitionllms.txt
llms.txt is a proposed convention: a Markdown file at a site’s root listing its important pages for AI systems. Adoption has grown quickly, but current measurement shows AI crawlers largely ignore it and fetch HTML directly instead.
DefinitionPrompt injection
Prompt injection is an attack where instructions hidden in content an AI system reads — a web page, an email, a document, a form submission — are treated by the model as commands rather than data. It is the main security concern for any agent that ingests untrusted input.
Definition