AEO, GEO and LLMO Explained for PR and Comms Teams
The difference between answer engine optimisation, generative engine optimisation and LLM optimisation — and the concrete work each one requires from a comms team.
SFStefan FerreiraHead of Editorial, PressCosmos11 min readAI search
Four acronyms arrived in comms decks at once, and most of them were used interchangeably by the end of the meeting. They are not the same thing, and the work each one requires is different.
Quick answer
AEO (Answer Engine Optimisation) structures content to be lifted as a direct answer. GEO (Generative Engine Optimisation) makes a brand likely to be cited inside a generated response. LLMO (Large Language Model Optimisation) makes an organisation factually retrievable and correctly described by a model. They overlap in practice but target different stages of the retrieval pipeline.
Key takeaways
AEO is content formatting: answer blocks, question subheads, FAQ schema.
GEO is corroboration: independent sources repeating the same facts, attributable to you.
LLMO is entity hygiene: consistent naming, structured data, open crawl policy.
Measure all three with share-of-answer, not traffic alone.
The three definitions
AEO
Answer Engine Optimisation
Optimising for the moment a system needs to produce a direct answer to a question. Formatting problem.
GEO
Generative Engine Optimisation
Optimising for being selected and attributed inside generated output. Trust and corroboration problem.
LLMO
Large Language Model Optimisation
Optimising what a model has learned or can retrieve about your organisation. Identity and retrieval problem.
How an AI answer is actually built
Simplified, most assistant answers follow the same shape:
Interpret the question and decide whether it needs fresh retrieval at all.
Retrieve candidate passages from whatever the system can access — an index, a live search, or cached pages.
Rank passages by relevance, authority and corroboration.
Generate an answer, citing sources when the product surfaces them.
Your release only matters at stages 2 and 3. That is why "we published a release" is not a strategy, and why a release that cannot be retrieved, or that no independent source repeats, produces no citations.
AEO in practice
Open with a 40–60 word answer block that stands alone without context
Write subheadings as the questions readers actually ask
Pair every question subheading with a direct answer underneath
Add FAQPage structured data to FAQ sections
Use tables and lists for anything comparative — they survive extraction
Avoid pronoun-heavy openings; name the subject explicitly
GEO in practice
Generative engines prefer claims they can corroborate. That is a distribution problem more than a formatting one.
Get the same core facts repeated across independent outlets, attributed to you
Publish original data — benchmarks, indices, survey results — that others must cite
Keep canonical URLs stable so citations do not decay into 404s
Name your organisation identically everywhere, including in boilerplates
Label paid placements clearly, because undisclosed ones erode the trust GEO depends on
LLMO in practice
Publish Organization structured data with legal name, address, contacts and sameAs profiles
Provide an llms.txt file summarising your organisation for retrieval systems
Allow the major AI crawlers explicitly in robots.txt rather than blocking them
Keep machine-readable feeds (RSS, JSON) current
State facts plainly — models reproduce hedging poorly and invent less when text is precise
Measuring it
Traffic analytics cannot see most AI citations, because the referral is often unattributed or absent entirely. You need a direct method:
Define a fixed question set — 20 to 40 questions your buyers actually ask.
Query each engine on a schedule and record whether you appear, citing which source.
Score accuracy: whether the model's statements about you are correct and current.
Track competitor share for the same questions, so movement is relative rather than absolute.
This is what our AI Visibility Suite automates across nine engines, and the methodology is the same one you would run manually.