AEO, GEO, AI SEO. The terms get used interchangeably and it's confusing. Here's what each one actually means and which one your business should care about.
Three letter acronyms are flying around the SEO world right now and they all seem to mean the same thing.
AEO. GEO. AI SEO. Each one promises to help your business get found in ChatGPT, Perplexity, or Google AI Overviews. The marketing copy makes it look like three different services. The reality is simpler than that.
This guide breaks down what each term actually means, where they overlap, and which one your business should focus on. By the end you will know exactly what you are buying when an agency offers any of the three.
If you would rather skip the theory and just see how it works in practice, read our GEO SEO complete guide or grab a free AI citation audit for your business. Otherwise, let us go.
The short answer
AEO, GEO, and AI SEO are three names for roughly the same thing. They all describe getting your business cited and recommended inside AI generated answers from tools like ChatGPT, Perplexity, Google AI Overviews, Gemini, and Claude.
The differences are technical and historical. AEO is the older term and the more precise one. GEO is a newer term that has become popular in 2025 and 2026. AI SEO is the umbrella label that everyone understands, even if it is the least accurate technically.
If you only remember one thing from this guide, it is this. The strategies are nearly identical. Pick whichever term feels right for your audience and move on.
What does AEO stand for?
AEO stands for Answer Engine Optimization. It is the practice of getting your business cited inside AI generated answers from any answer engine.
The term comes from the early days of voice search and featured snippets. It was being used when Google was rolling out its featured snippet boxes around 2017. Back then, an "answer engine" meant any search engine that returned a direct answer rather than a list of links.
Today the term covers all the major AI search tools. ChatGPT, Perplexity, Gemini, and Claude are all answer engines. Google AI Overviews counts as an answer engine. Any tool that gives users a direct answer instead of a list of websites falls under AEO.
AEO is the most accurate technical term, which is why specialists tend to prefer it. It also has lower search competition than AI SEO, which makes it useful for ranking content.
What does GEO stand for?
GEO stands for Generative Engine Optimization. It is the practice of getting your business cited inside content generated by large language models.
The term became popular in academic and SEO circles in 2024 and exploded in usage through 2025. Search volume for "GEO SEO" grew 1,200% in twelve months, according to keyword data from DataForSEO. It is now one of the fastest growing SEO terms in Australia. The original GEO research paper from Princeton is worth reading if you want the technical foundations.
GEO has a slightly narrower meaning than AEO. AEO covers any answer engine, including older voice assistants and featured snippet boxes. GEO is specifically about generative AI, the kind that creates new content rather than just retrieving existing answers.
In practice, the distinction does not matter for most businesses. The optimisation work is the same.
What does AI SEO mean?
AI SEO is the umbrella term that covers everything related to getting found by AI tools. It includes AEO, GEO, optimisation for AI Overviews, and sometimes also using AI tools to do traditional SEO work.
The term is popular because it is intuitive. Anyone hearing "AI SEO" understands roughly what it means. AEO and GEO require explanation.
The downside is that AI SEO is vague. It can mean three different things depending on who is using it. Some agencies use AI SEO to mean optimising for AI search engines. Others use it to mean using ChatGPT to generate content. A few use it to mean both.
When you see "AI SEO services" advertised, ask exactly what is included. Some agencies bundle AEO and GEO under that label, which is good. Others just mean they use AI to write blog posts, which is not what you want.
Side by side comparison
Here is the practical breakdown of the three terms.
| Aspect | AEO | GEO | AI SEO |
|---|---|---|---|
| Full name | Answer Engine Optimization | Generative Engine Optimization | AI Search Engine Optimization |
| Coined | 2017 to 2018 | 2023 to 2024 | 2023 to 2024 |
| Specifically targets | Any answer engine | Generative AI specifically | All AI search tools |
| Engines covered | ChatGPT, Perplexity, Gemini, Claude, Google AI Overviews, voice assistants | ChatGPT, Perplexity, Gemini, Claude | All of the above plus AI generated content |
| Australian search volume | 110/month | 260/month | 1,000/month |
| Keyword difficulty | 29 | 23 | 40 |
| Best for | Specialist work | Lower competition | Broad audience |
The three terms overlap so heavily that most agencies cover all of them under one program. We do, and most decent specialists do too. Worry less about the label and more about what is actually being done.
Not sure where you stand? Run our free citation audit across ChatGPT, Perplexity, and Google AI to see exactly which of the three matters most for your business right now.
What signals do all three optimise for?
Whether you call it AEO, GEO, or AI SEO, the signals you optimise for are the same. AI engines reward the same things regardless of which acronym you use.
Citability. Your content needs to be structured so AI engines can lift quotes that answer questions. That means clear definitions, short paragraphs, lists, tables, and specific facts.
Topical authority. AI engines learn that you are an expert when you cover a topic deeply. One article does not build authority. Twenty interconnected articles on the same theme does.
Brand mentions across the web. AI engines pull from Reddit, YouTube, news sites, podcasts, and review platforms. Being mentioned in many places by people who are not you trains the AI to recognise your brand.
Schema markup. Structured data tells AI what your content is about. Organization, Service, FAQPage, and Article schemas matter most. Reference the full vocabulary at Schema.org.
AI crawler access. GPTBot, ClaudeBot, PerplexityBot, and Google Extended need to be able to read your site. Many sites accidentally block them.
Freshness and updates. AI engines favour current content. A 2026 article will be cited over a 2022 article on the same topic.
Original first party data. Original research, surveys, case studies, and frameworks signal expertise. Aggregated content is less valuable to AI engines.
Which term should your business use?
The choice depends on your audience and your competition.
Use AEO if you are speaking to other marketers or technical buyers. The term is more precise and signals expertise. It also has lower keyword competition than AI SEO, so it is easier to rank for content targeting that term.
Use GEO if you want to ride the wave of a fast growing term. GEO has +1,200% year over year growth in search volume and the keyword difficulty is only 23. This is the sweet spot for businesses building topical authority right now.
Use AI SEO if you are speaking to general business owners who are not deep in marketing. AI SEO is the most recognisable term, which makes the value clear without explanation.
The best agencies cover all three under one program and use whichever term resonates with the client. We do all three, and we use the term that fits the conversation.
Common misconceptions
A few things people get wrong when they first hear about AEO, GEO, or AI SEO.
Misconception 1: It is the same as using AI to write content. It is not. AEO and GEO are about getting cited by AI engines. Using AI to generate content is a different thing entirely, and one that AI engines often penalise when they detect it.
Misconception 2: It replaces traditional SEO. It does not. AI search and Google search work together. Many of the same signals matter for both. The smartest strategy combines them.
Misconception 3: It is only for big brands. It is not. Right now small businesses have a real advantage in AEO and GEO because the space is uncrowded. A local plumber or electrician in Melbourne or Sydney can dominate AI citations in their category in months.
Misconception 4: You need to optimise differently for each AI engine. Mostly false. ChatGPT, Perplexity, Gemini, and Claude reward similar signals. The differences are minor and not worth a separate strategy for each.
Misconception 5: It is just a fad. Not even close. AI search is growing faster than any search trend in the last decade. Around 80% of consumers now use AI tools for some of their searches. The shift is permanent.
Frequently asked questions
Is GEO SEO better than AEO?
No, they are essentially the same thing with different names. GEO has slightly more search volume in Australia and lower keyword difficulty, so it can be useful as a content angle. The actual optimisation work is identical.
Should I hire an AEO specialist or an AI SEO agency?
Pick based on what they actually do, not what they call it. Ask them three questions. How do you measure citation share? What is your process for restructuring content for citability? Do you handle llms.txt and schema setup?
If they answer all three with specifics, the label does not matter. If they cannot answer, no label saves them.
Will AI SEO replace traditional SEO entirely?
Not in the next five years. Google still drives the majority of search traffic, and many AI engines pull from Google's index anyway. The right approach is to do both at once and let them reinforce each other.
The businesses that ignore AI search will be at a disadvantage by 2027. The businesses that ignore traditional SEO will be at a disadvantage today. Do both.
How do I know if my business is being cited by AI?
Open ChatGPT, Perplexity, and Gemini and ask them the questions your customers ask. Type things like "best plumber in Melbourne" or "who should I call for an electrician in Sydney." See whose names come up.
If yours does, you are doing something right. If not, you have work to do. We offer a free AI citation audit that does this for you across thirty common search prompts.
Which acronym will win in the long run?
AEO is most likely to be the standard technical term in five years. GEO is the fastest growing term right now. AI SEO will probably stay as the umbrella label everyone understands.
For your own content strategy, target all three terms with separate articles. They each capture different audiences searching for slightly different things.
Want to actually move the needle on AI search? Read the complete GEO SEO guide for the step by step playbook, or book a free citation audit to see exactly where your business stands across ChatGPT, Perplexity, and Google AI today.
If you want to combine AI search with traditional rankings, here is how we approach SEO for Australian businesses and Answer Engine Optimization.