AIO Terminology: AEO, GEO and LLMO explained
AIO (AI Optimization) is the umbrella covering all AI surfaces. Inside it sit three distinct disciplines with different goals. Here's how to tell them apart — and the one metric that ties them all together.
The landscape
AIO is the umbrella over every AI surface
AIO (AI Optimization) covers optimization across ChatGPT, Gemini, AI Overviews and every other AI surface — AEO, GEO and LLMO are the three disciplines inside it. (Some articles use "AIO" narrowly as "AI Overview Optimization"; we use it as the umbrella term.) SEO remains the foundation beneath them all.
Definitions
Five terms, clearly defined
| Term | Full name | Goal (what "winning" means) | Main surfaces | Origin |
|---|---|---|---|---|
| SEO | Search Engine Optimization | Rank in the list of links. "#1" = first blue link. | Google / Yahoo SERP | Classic |
| AEO | Answer Engine Optimization | Get into the direct answer, not the link list. Fastest to show results (1–3 months). | Featured snippets, voice assistants, AI Overviews block | Predates generative AI |
| GEO | Generative Engine Optimization | Become a source the generative engine cites in its synthesized answer. Not "#1" — one of the few sources the AI picks. | ChatGPT, Perplexity, Gemini | Academic paper, 2024 |
| LLMO | Large Language Model Optimization | The longest horizon: the model itself knows your brand correctly, via training data and durable web-wide signals (6–12+ months). | The LLM's own knowledge | Olaf Kopp (2023) |
| AIO / GAIO | (Generative) AI Optimization | Umbrella: optimize across all AI surfaces at once. | All AI surfaces | GAIO coined by Philipp Klöckner |
The north-star metric is AI visibility
AI visibility is the measurable outcome: how much and how your brand appears in AI answers. The core metric is share of voice in AI answers. AEO, GEO and LLMO are all methods that point to this one number. It is exactly what Suparanku measures — the Visibility axis in its five-axis analysis.
The three disciplines
Each has a distinct goal and timeline
AEO
Fastest · 1–3 moAnswer Engine Optimization
Get cited as the "answer" in AI Overviews, featured snippets and voice search. Built on structured content and schema markup.
Learn moreGEO
Mid-termGenerative Engine Optimization
Become one of the few sources ChatGPT, Perplexity and Gemini cite in their synthesized answers. Content, technical and off-site signals.
Learn moreLLMO
Longest · 6–12 mo+Large Language Model Optimization
Get the model itself to know your brand correctly — via training data and durable, consistent signals spread across the web.
Learn moreFAQ
Common questions about AIO terminology
What is the difference between AIO, AEO, GEO and LLMO?
AIO (AI Optimization) is the umbrella covering every AI surface. Inside it sit three disciplines: AEO gets you into the direct answer (AI Overviews, snippets, voice), GEO gets you cited as a source in generative answers (ChatGPT, Perplexity, Gemini), and LLMO shapes the model's own long-term knowledge of your brand. They differ in goal, target surface and timeline — but they reinforce each other.
Is AIO just the new name for SEO?
No. SEO optimizes for ranked links on a search results page; AIO optimizes for how AI systems answer, cite and recommend your brand — where there is often no link list at all. SEO remains the foundation beneath AIO, but it is not the same goal. The two run in parallel rather than one replacing the other.
Which discipline should I start with?
It depends on your timeline. AEO shows results fastest (1–3 months) and is the usual starting point. GEO is the mid-term play (3–6 months) and has the biggest demand-capture opportunity today. LLMO is the longest horizon (6–12+ months). Most brands sequence them — AEO first for quick wins, GEO and LLMO building durable presence over time.
What is "AI visibility" and how is it measured?
AI visibility is the measurable outcome all three disciplines point to: how much, and how favorably, your brand appears in AI answers. The core metric is share of voice in AI answers — the percentage of relevant prompts where AI mentions you. It is the north-star KPI that ties AEO, GEO and LLMO together, and exactly what Suparanku measures.
Why do different articles define these terms differently?
The field is new and terminology is still settling. "AIO" in particular is sometimes used narrowly to mean "AI Overview Optimization"; we use it as the umbrella term for all AI optimization. GAIO (coined by Philipp Klöckner) is a near-synonym for the umbrella. What matters is the underlying distinction — direct answers vs. generative citations vs. the model's own knowledge — not the exact label.
Do I need all three — AEO, GEO and LLMO?
Most brands benefit from all three, but not at once. They target different surfaces and buyer behaviours, so covering all three gives the broadest AI visibility. In practice you prioritize by where your audience already asks questions and how quickly you need results, then expand coverage over time.
Contact
Take the next step — at your own pace.
Not sure about scope or budget yet? No problem. Whether you're just gathering information or ready to discuss a project, there are three ways to start — all free of charge.