AEO, GEO, LLMO, AI SEO: what the acronyms mean and which ones matter
AEO, GEO, LLMO, and AI SEO all name the same job: making your business more likely to be named when someone asks an AI assistant a question in your market. They are not different services, and nobody should sell them to you as different services. The label mostly tells you who’s talking, not what they’ll do.
Why there are five names for one thing
New markets get land-grabbed by naming. Coin the term, own the category, rank for it, sell against it. That’s the whole story, and it’s worth being blunt about because the acronym circus is itself a sales tactic: a vendor who insists their acronym is a distinct discipline is usually selling the rebrand, not new work. Our opinion, stated once and defended: the industry’s five-names-for-one-thing habit costs owners real money, because it makes one purchase look like four, and the suspicion that this is all a rebrand is partly earned by exactly this behavior.
Each term in one paragraph
AEO (Answer Engine Optimization)
AEO frames the work around engines that answer questions instead of listing links. The emphasis is on being the answer: structuring content so a system that responds with one response picks yours. The term predates the current AI wave (it was used for featured snippets and voice assistants) and got recycled when chat assistants arrived.
GEO (Generative Engine Optimization)
GEO is the academic entry. The term was formalized in a November 2023 research paper by Aggarwal and co-authors from IIT Delhi and Princeton, later published at KDD 20241, which studied how content changes affect visibility inside generated answers. Because it has a citable origin, GEO is the label you’ll see most in research and tooling.
LLMO / LLM SEO
LLMO (“large language model optimization”) and LLM SEO frame the work around the models themselves. These labels show up in technical writing and tool marketing. They mean the same work; the framing just leans toward the machinery.
AI SEO
AI SEO frames the work as a continuation of search practice: same discipline, new surface. Agencies with existing SEO clients tend to use it because it maps onto contracts their clients already understand. The risk in the label is that it papers over what actually changed, which is the difference between ranking on a list and being named in an answer.
AI visibility
AI visibility names the outcome instead of the method: whether AI assistants mention your business when customers ask who to hire. We use it with owners because it says what you get, not how the industry does it. Every other acronym on this page describes work toward this same outcome.
Which term you’ll hear where
Tools and researchers say GEO. Technical writers say LLMO. Agencies pitching existing search clients say AI SEO or AEO. People selling to owners increasingly say AI visibility, because it’s the only label that doesn’t need translating. None of this maps to a difference in the work; it maps to who the seller learned the vocabulary from.
What to actually care about
The work is the same under every label: real reviews, complete and consistent listings, a site AI systems can read, answers written the way customers actually phrase their questions, and third-party mentions that corroborate what you say about yourself. When a vendor uses any of these acronyms, ask them to name the work behind it. A good vendor’s answer will sound the same whichever term they opened with, and a vendor whose answer is mostly the acronym has told you what you needed to know. The full vocabulary of this space lives in our plain-language glossary of AI visibility terms, one definition at a time.