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GEO — generative engine optimisation

How large language models decide which sources to quote — and what to change so the answer includes you.

Definition

GEO (generative engine optimisation) is the practice of making your content the material a large language model draws on and cites when it generates an answer.

The generative engines that matter commercially are ChatGPT, Google Gemini and AI Overviews, Anthropic's Claude, Perplexity and Microsoft Copilot. Also written generative engine optimization, and used interchangeably with LLM optimization, LLM SEO and — loosely — GEO SEO.

On this page
What GEO is How engines choose citations What actually gets cited GEO vs SEO Implementation plan Questions, answered

What GEO is, precisely

A generative engine does not retrieve a page and show it to you. It retrieves several dozen candidate sources, reads them, and writes something new — synthesising a paragraph that may draw a phrase from one source, a number from another and a recommendation from a third. GEO is the discipline of ensuring your content is among the material it draws from, and that you are named when it does.

That framing has a consequence worth sitting with: the model is not choosing your page, it is choosing your sentences. Page-level thinking — word counts, keyword density, dwell time — is the wrong unit. The right unit is the passage: a claim specific enough to be worth quoting, phrased clearly enough to be quotable, and attributable enough that citing you is the natural thing to do.

Why "generative" is the operative word

The distinction from AEO is narrow but real. Answer engine optimisation covers any system that returns a direct answer, including featured snippets and voice results, which often just read out an existing sentence. Generative engine optimisation is specific to systems that write the answer — which means they can paraphrase you, combine you with a competitor, or describe your business in words you never wrote. Managing that is part of the job.

GEO and LLM optimization are the same thing

The industry landed on several names in parallel. GEO is the term used in academic work on the subject and has become the default; LLM optimization and LLM SEO describe the same practice from the model's side rather than the engine's. There is no meaningful methodological difference between them.

How a generative engine chooses what to cite

Retrieval, then selection, then attribution — and each stage discards most of what reached it.

01

Query fan-out

One question becomes many. The engine issues several searches at once, each targeting a different facet of what was asked.

02

Candidate retrieval

Dozens of pages are pulled from a live index, plus structured records and whatever the model already holds from training.

03

Passage selection

Pages are chunked and scored at passage level. Most of a page is discarded; a few sentences survive to the next stage.

04

Synthesis

Surviving passages are combined into new prose. Specific, confidently-stated claims dominate — vague ones are dropped as unusable.

05

Attribution

A subset of sources is linked. Clear authorship, a stable URL and a traceable claim make attribution far more likely.

What actually gets cited

Two pages can cover the same subject at the same length, and only one gets quoted. The difference is almost always specificity and attributability.

ElementRarely citedFrequently cited
Claims"Fast, affordable and reliable""From $1,200, typically 2–3 weeks, excluding strata searches"
Statistics"Most businesses struggle with this""In our 2026 audit of 340 Australian sites, 71% had invalid schema"
AttributionUnsigned, undated marketing copyNamed author, stated credentials, visible publish and update dates
QuotesNo direct speechNamed person, role, organisation, quoted directly
StructureAnswer buried in paragraph fourSelf-contained answer in the first sentence under the heading
DefinitionsImplied through context"X is Y that does Z" — stated plainly, once, early
CorroborationOnly your own site says itDirectories, press and industry bodies state the same facts
FormatText-only wallTables, ordered steps and comparisons a model can restate

GEO vs SEO, in one paragraph

SEO optimises for a ranked list a person chooses from. GEO optimises for a written answer the model composes on their behalf. SEO's currency is the click; GEO's is the citation. The confusion comes from how much they share — crawlability, site health, authority and content quality serve both — but the finish lines differ, and so does the report at the end of the month.

The practical relationship is stacking, not substitution. Generative engines retrieve candidates from live search indexes, so a page that ranks poorly is rarely retrieved at all. Strong SEO remains one of the more reliable inputs to being cited.

Full GEO vs SEO comparison
Related comparisons
GEO vs SEO AEO vs GEO AEO vs SEO vs GEO Is SEO dead?

A GEO implementation plan

Eight moves. The first three are prerequisites; skipping them wastes the rest.

01

Serve real HTML

Many AI crawlers never execute JavaScript. Prerender or server-render every page that matters, and verify by viewing the raw source rather than the rendered DOM. This is the most common single reason a good site is invisible to assistants.

02

Fix the entity

One Organization node with a stable identifier, referenced by every page. Business name, address, phone, ABN, hours, service areas and social profiles identical on your site, your Google Business Profile and every directory carrying you.

03

Validate your structured data

Organization, LocalBusiness, Service, FAQPage, Article and Product where relevant. Invalid markup is discarded silently, so validation is not optional — and schema must match what a human sees on the page.

04

Write in quotable units

One claim per passage, stated plainly, with the specifics attached. Open each section with the answer. Assume the paragraph will be read entirely out of context, because it will be.

05

Publish something only you have

Original data, survey results, pricing benchmarks, case outcomes, a methodology. Models preferentially cite sources that supply information they cannot get elsewhere — this is the strongest and slowest lever.

06

Attribute everything

Named authors with credentials, publish and update dates, cited sources for statistics, direct quotes from identified people. Attribution signals are how a model judges whether a claim is safe to repeat.

07

Build independent corroboration

Industry associations, directories, local press, supplier and partner pages, review platforms. Agreement between unrelated sources is what turns your claim into the model’s fact.

08

Test monthly against a fixed prompt set

The same twenty prompts, the same competitors, the same platforms, every month. Track citation frequency and description accuracy. Without a baseline you are guessing about your own results.

GEO questions, answered

What is GEO?

GEO stands for generative engine optimisation. It is the practice of making your content the material a large language model draws on and cites when it generates an answer — across ChatGPT, Gemini, Claude, Perplexity, Copilot and Google AI Overviews. Where SEO competes for a position in a list, GEO competes to be quoted inside the text the model writes.

What is GEO SEO?

GEO SEO refers to running generative engine optimisation alongside traditional SEO as one programme. The two share the same technical foundation — crawlable pages, clean site architecture, credible authority signals — and diverge only in content shaping and measurement, so most businesses deliver them together rather than separately.

What is the difference between GEO and SEO?

SEO optimises for a ranked list of blue links that a person chooses from; GEO optimises for inclusion in a single generated answer that the model writes on the person's behalf. SEO's currency is the click, GEO's is the citation. SEO rewards relevance and backlinks; GEO additionally rewards quotable phrasing, specific data, clear attribution and independent corroboration.

Is GEO the same as LLM optimization?

Effectively yes. LLM optimization, LLM SEO and GEO all describe optimising for large language models. GEO is the term that has settled in the industry and in academic literature; LLM optimization is the more literal description of the same work.

How do you do GEO?

Make every page fully readable as raw HTML, since many AI crawlers do not run JavaScript. Add valid structured data and a consistent entity. Write in quotable units — a clear claim, a specific number, an attributable source. Include original data, direct quotes and cited statistics, which measurably increase the chance of being included. Build independent corroboration through directories, press and industry sources. Then test a fixed prompt set monthly to see whether you are being cited.

Does GEO replace SEO?

No. Generative engines retrieve from live search indexes for most current-information queries, so a page that ranks poorly is rarely retrieved as a candidate in the first place. GEO sits on top of SEO rather than replacing it — strong traditional search performance is one of the more reliable inputs to being cited.

What content gets cited by generative engines?

Content with specific, checkable claims: original data, named sources, direct quotes from identified people, precise numbers, dated statistics and clear definitions. Generic marketing prose is rarely quoted because there is nothing in it a model can attribute. Structure matters as much as substance — self-contained passages that survive being lifted out of context are far more likely to be used.

How do you measure GEO?

Track citation frequency across a fixed set of prompts run on each major assistant, share of answer against named competitors, whether the generated description of your business is accurate, and referral sessions from assistant domains in your analytics. Re-run the same prompts on the same schedule so the numbers are comparable month to month.

See whether AI is citing you today.

A baseline across six AI surfaces, scored against your named competitors.

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