TL;DR
- Same job, many names. LLMO, GEO and AI SEO all mean: get named in an AI answer.
- Google says it's still SEO. Its July 2026 guide says so in plain words.
- Four names mean two things. AEO, LLMO, AIO and AI SEO. Each one.
- Most searched: AI SEO, at 8,500 a month. Generative engine optimization is close behind, at 7,200.
- Which to say: AI SEO to a boss. GEO for a source. Never LEO.
Does AI name your brand? Check your site.
LLMO. GEO. AEO. AIO. LEO.
It's one job with a pile of names.
SEO gets your page into a list of links.
Most of the others get your brand into an AI answer.
That's the whole difference.
So why the fuss?
Because the guides don't agree on what the names mean. And a label with two meanings is a bad thing to put in a contract.
I say AI SEO. My product is called AI SEO Tracker. Weigh that.
The acronyms at a glance
| Term | Stands for | Most guides use it for |
|---|---|---|
| SEO | Search Engine Optimization | Ranking a page in a list of links |
| AI SEO | AI Search Optimization | SEO for AI answers |
| GEO | Generative Engine Optimization | Getting cited in AI answers |
| LLM SEO | Large Language Model SEO | AI SEO, technical name |
| LLMO | Large Language Model Optimization | An umbrella, or model memory |
| AEO | Answer Engine Optimization | Snippets and voice, or AI chat |
| AIO | AI Optimization, or AI Overviews | Two meanings |
| LEO | LLM Engine Optimization | Rare. Google shows astrology. |
LLMO vs SEO
LLMO stands for large language model optimization.
The job: get ChatGPT, Gemini and Perplexity to mention and cite your brand.
| SEO | LLMO, GEO and AEO | |
|---|---|---|
| Target | A page in a list of links | A brand inside an AI answer |
| A win is | A high rank and a click | Your brand named, your page cited |
| You check it with | Rank trackers and Search Console | Scans of AI answers for your brand |
Google says the base is still SEO.
Its guide to generative AI features (updated 10 July 2026) names AEO and GEO. Then it calls the work "still SEO".
Google's other page, AI features and your website, adds: no additional requirements to appear in AI Overviews or AI Mode.
That's Google only. What about ChatGPT?
Ahrefs's Ryan Law argued in April 2025 that GEO overlaps massively with SEO.
The clearest difference, he says, is probably brand mentions without a link. LLMs care about those more than search engines do.
So keep doing SEO. Then add the one check that SEO tools skip:
Does the AI name you?
How to check: how to measure AI brand visibility. The longer comparison: AI SEO vs traditional SEO.
LLMO vs GEO
Same goal. Your brand in AI answers.
Where's the line between them? Depends who you read.
- "Same thing." Ahrefs calls GEO, LLMO and AEO three names for one idea. Entail says the same of GEO, AIO and LLMO.
- "LLMO is the umbrella." Pepper puts GEO, AEO and AIO inside it.
- "LLMO is the narrow one." Xponent21 and Omnius: it's how a model describes you from training data. No live search.
Three guides put the overlap at about 80%: DevCommX, Onely and Ziptie.
None shows a method. So it's an estimate.
One split you can act on. Search bots and training bots are separate.
- OpenAI: OAI-SearchBot is for search. GPTBot is for training. You can allow one and block the other.
- Perplexity: PerplexityBot is for search results. Not for training foundation models.
My take: all three views are fair. None changes what you do first.
You need pages worth citing. And you need to check if the engines name you.
Someone sells LLMO as a thing apart from GEO? Ask what they'll do differently.
No task? Then you're paying for a label.
Where the guides disagree
Put the guides side by side. Four names get two meanings each.
| Term | One common meaning | The other meaning |
|---|---|---|
| AEO | Featured snippets, voice and answer boxes: Pepper, Onely, DevCommX | Being the answer inside AI engines such as ChatGPT: Omnius |
| LLMO | The umbrella over GEO, AEO and AIO: Pepper | A model answering from memory: Xponent21, Omnius |
| AIO | Optimizing for Google AI Overviews: Pepper, Xponent21 | AI Optimization, meaning AI in your own workflow: Xponent21. Also "all-in-one": Firebrand, April 2025 |
| AI SEO | SEO for AI answers, covering GEO, AEO and LLMO: Onely | AI tools for SEO work such as keyword research: Omnius, Onely |
GEO is the only one with a single meaning in these guides.
Serpstat says the industry doesn't use GEO, AEO and LLMO consistently. No kidding.
Related: answer engine optimization and how to track Google AI Overviews.
Does AI name you?
See if AI mentions your brand. Then get the pages to fix.
How often people search each name
I looked it up. Ahrefs Keywords Explorer, US, 2 October 2026.
| Search | 12-month average | Latest month |
|---|---|---|
| ai seo | 8,500 | 6,583 |
| generative engine optimization | 7,200 | 7,200 |
| answer engine optimization | 5,000 | 3,339 |
| llm seo | 1,600 | 1,083 |
| llmo | 800 | 901 |
AI SEO leads. About 5 times LLM SEO. About 10 times LLMO.
But generative engine optimization is at 85% of it. And ahead in the latest month.
Call it a tie.
What about the short strings?
- geo: 53,000
- aio: 25,000
- leo: 212,000
- aeo: 8,200
Big numbers. But they mean other things. Leo is a zodiac sign. And I can't tell how much of "aeo" is the SEO meaning.
One more. People compare GEO with SEO far more than LLMO with SEO:
- geo vs seo: 2,700 a month
- llmo vs seo: 150
Treat all of these as estimates.
AI SEO: AI Search Optimization
SEO for AI answers. That's all it means.
A non-technical reader gets it right away. That's why I use it.
Try both on a CMO:
- "We need a GEO strategy." → "What's a GEO?"
- "We need an AI SEO strategy." → "SEO for AIs. Got it."
My view. Not a measurement.
The catch: Omnius and Onely also use AI SEO for AI tools that do SEO work. So define it once.
And Xponent21 calls the related AISEO label fine for a service name, but a poor instrument for strategy.
GEO: Generative Engine Optimization
The one name with a research paper behind it.
"GEO: Generative Engine Optimization" went on arXiv in November 2023. KDD 2024 accepted it.
The abstract says GEO can boost visibility in generative engine responses by up to 40%. Results vary by domain. (arXiv)
The tactics: Generative Engine Optimization.
The problem? The bare word.
Google's AI Overview for "geo" lists:
- A prefix that means earth
- The Group on Earth Observations
- Gene Expression Omnibus
- The country code for Georgia
No SEO in sight. So spell it out.
LLM SEO: Large Language Model SEO
AI SEO with the technical name.
1,600 US searches a month. Against 8,500 for "ai seo".
It's accurate. But the reader must know what an LLM is.
Do the test: ask your mom what "LLM SEO" means. She'll shrug. Ask about "AI". She knows.
The playbook: LLM SEO.
LEO: LLM Engine Optimization
Rare. Very rare.
LEO stands for LLM Engine Optimization.
Who uses it?
- Towards AI, in March 2025.
- The agency Saffron Edge, in a post updated September 2025.
That's about it. I checked 15 guides that rank for this topic. None uses it. (Counted 2 October 2026.)
Don't use it alone.
Which term to use
| Who you are talking to | Say | Why |
|---|---|---|
| An executive or a client | AI SEO, defined once | The most searched SEO-style name. Xponent21 prefers GEO, which has a research definition. |
| Anyone who wants a source | GEO, spelled out | It has a research paper. Bare "geo" means other things. |
| Someone who means Google's feature | AI Overviews | AIO also means AI Optimization. |
| Someone who means snippets and voice | Featured snippets, or AEO defined | Most guides use AEO this way. Omnius does not. |
| Someone who means model memory | LLMO, defined | Xponent21 and Omnius use it this way. |
| A vendor, in a contract | Engines, prompts and deliverables | Onely lists "terminology without specifics" as a red flag. |
| Anyone | Not LEO alone | No ranking guide uses it. |
Ask any vendor three things:
- Which engines will you work on?
- Which pages and prompts will show it worked?
- How do I check that an engine names my brand?
And under any name, the first steps are the same:
- Make pages indexable. Google requires it.
- Let the search bots in. OpenAI and Perplexity recommend allowing OAI-SearchBot and PerplexityBot in robots.txt.
- Get named on other sites.
- Check what the engines say. Page Inspector shows the title, headings and text an AI can read on a page.
FAQ on AI SEO acronyms
What does LLMO mean?
Large Language Model Optimization. The work of getting AI models to mention and cite your brand.
What is the AI version of SEO called?
By 12-month average, the most searched name is AI SEO, at 8,500 a month. Generative engine optimization is close behind, at 7,200. You'll also see GEO, AEO, LLMO and LLM SEO. Which term to use says when.
Is LLMO the same as SEO?
No. But they overlap. SEO ranks a page in a list of links. LLMO aims for a mention or a citation in an AI answer.
Is LLMO the same as GEO?
Almost. Same goal. Some writers call LLMO the broader term. Some call it the narrower one. See LLMO vs GEO.
What is the difference between GEO, AEO and AIO?
- GEO: citations in AI answers.
- AEO: direct answers. Mostly snippets and voice.
- AIO: AI Optimization to some. AI Overviews to others.
What is LEO in SEO?
LLM Engine Optimization. A rare name for AI SEO. Search "what is LEO" and you get astrology.
Is LLMO snake oil, or do I need to deal with it?
The acronym is noise. The question behind it is real.
When a customer asks an AI about your category, does it name you? Check that first.
Be careful with anyone who sells LLMO as a secret method or a guaranteed result. Google says no special optimizations are needed for AI Overviews and AI Mode (source).
How do I track AI SEO results?
Check if AI engines mention and cite your brand. And how often competitors show up instead.
AI SEO Tracker does it with a report. $49, once. Up to 50 prompts on ChatGPT, Perplexity, Gemini, Copilot and Google AI Overviews. Daily for 7 days. One brand.
It doesn't scan Google AI Mode, Claude, Grok, DeepSeek or Meta AI.
Other options: best AI visibility tools.
