SEO vs AEO vs GEO: What Is the Real Difference?

Short answer: SEO (search engine optimisation) tries to rank your pages in the blue links so people click. AEO (answer engine optimisation) tries to get your content lifted out as the direct answer in snippets and voice results. GEO (generative engine optimisation) tries to get your business cited or recommended inside AI-written answers from ChatGPT, Perplexity, Gemini, Claude and Google's AI Overviews.

The three terms get used as if they were rival religions. They are not. They are three layers of the same job, which is making sure that when a customer asks a question, the answer includes you. We have already gone deep on two of the pairings, in AEO vs SEO and AEO vs GEO. This post is the umbrella view: all three side by side, and an honest take on where your time and money should go.

What is SEO?

SEO is the work of getting your web pages to rank high in a search engine's list of results, so that people see your link and click it. Success is measured in rankings, impressions and clicks. It is the oldest of the three and still the foundation the other two sit on.

Google describes Search as three stages: crawling, indexing and serving results. SEO is about doing well at each stage: making your pages findable, understandable and more relevant than the competition for a given search.

• The unit of success is a click on a link.
• The signals include relevance to the search, page quality, links from other sites, site speed and technical health.
• The weakness is that more and more searches end with an answer on the results page, so a good ranking does not always mean a visit.

What is AEO?

AEO is the work of shaping your content so a search engine or voice assistant can pull it out and show it as the answer itself, rather than just a link. Think featured snippets, "People also ask" boxes and spoken answers. Success is being the quoted answer.

One thing to be clear about: you cannot switch this on. Google says plainly that it is its own systems that decide whether a page makes a good featured snippet. What you can do is write pages that are easy to lift. (Many people, including us, now use "AEO" more broadly to cover AI answers too. Our guide to answer engine optimisation explains that wider meaning.)

• The unit of success is having your sentence shown as the answer.
• The tactics are answer-first paragraphs, question-style headings, short lists and tables, and clean structured data.
• The catch is that a snippet answers the question on the spot, so it can win visibility while losing the click.

What is GEO?

GEO is the work of getting your business mentioned, cited or recommended inside answers written by generative AI, such as ChatGPT, Perplexity, Gemini, Claude and Google's AI Overviews. The AI writes a fresh answer each time, often from several sources, and the goal is to be one of the names or links it includes.

The term comes from a 2023 research paper, "GEO: Generative Engine Optimization" by Aggarwal et al. (later published at KDD 2024). The authors tested ways of rewriting web content and reported that the right changes could raise a source's visibility in AI answers by up to 40%. Three findings are worth knowing for any business owner:

• Evidence wins. Adding statistics, quotations and citations to sources were among the best-performing methods.
• Old tricks flop. Keyword stuffing, a classic bad-SEO habit, did little or nothing in their tests.
• Smaller sites can gain the most. Some methods helped sources that ranked lower in the underlying search results far more than the top-ranked ones.

That last point is the hopeful one for a local business competing against big directories. It is a lab study, not a guarantee, but it matches what we see: clear, specific, well-supported content gets quoted.

How are SEO, AEO and GEO different?

They differ mainly in what the engine does with your content: SEO gets it listed, AEO gets it extracted, and GEO gets it blended into a new answer alongside other sources. That changes where you show up, how you measure progress and which signals matter most.

Where they overlap is bigger than where they differ:

• All three need crawlable pages. If a bot cannot read your site, nothing else matters. OpenAI, for example, says sites that block its search crawler will not be shown in ChatGPT search answers.
• All three reward clear, accurate, useful content written for people, not for robots.
• AEO and GEO share a writing style: answer the question first, then explain.
• GEO leans hardest on what others say about you. Reviews, directories and mentions on other sites carry more weight when an AI is choosing who to recommend. See what sources AI engines actually cite.

Do you still need SEO if you do GEO?

Yes. Many AI tools search the web live before they answer, so pages that are hard to find in search are also hard for AI to find. Good SEO is the entry ticket for AEO and GEO, not a competitor to them.

Google is blunt about this for its own AI features. Its guidance says there are no additional requirements to appear in AI Overviews or AI Mode, and that the same foundational SEO best practices apply. It also says you do not need special AI text files or new markup to appear there. So be wary of anyone selling a secret AI-only trick for Google.

What changes with GEO is emphasis, not a whole new rulebook:

• Mentions matter more than just links. An AI weighing who to recommend looks at whether other sources agree you are good at this.
• Specifics matter more than keywords. Prices, service areas, credentials and hours give an AI something concrete to repeat.
• Consistency matters more than volume. If your phone number, hours or services differ across sites, an AI has a reason to hesitate.
• Other AI tools are not Google. ChatGPT, Perplexity and Claude run their own crawlers and pick their own sources, so it is worth checking each one directly.

The key takeaway is that SEO, AEO and GEO are not three separate budgets but three stages of one journey: be findable, be quotable, be recommendable. SEO earns you a place in the index, AEO makes your content easy to lift, and GEO makes you the name an AI feels confident repeating. Skipping the first stage undermines the other two, and stopping at the first leaves customers you never hear from.

Which should a local business focus on first?

Start with the basics that serve all three at once: a complete Google Business Profile, a clear website that states what you do and where, and consistent details everywhere you are listed. Then add answer-first FAQ content, and then work on reviews and outside mentions that AI tools draw on.

A sensible order for most local businesses:

1. Fix the foundation. Make sure search engines and AI crawlers can reach your pages, your site loads properly on a phone, and your name, address and phone number match everywhere.
2. Fill in your Google Business Profile. Categories, hours, services, service area, photos. It feeds Google's local results and is widely read elsewhere. Our Google Business Profile guide covers it.
3. Write pages that answer real questions. "How much does X cost in [your town]?", "Do you do emergency call-outs?", "Who is best for Y?" Answer in the first sentence, then give detail.
4. Add structured facts. Schema markup states your business details in a format machines read cleanly. See schema markup for AI search.
5. Build proof from others. Steady recent reviews, responses to them, and listings on the directories and local sites in your trade.
6. Check what the AIs actually say. Ask ChatGPT, Gemini, Claude and Perplexity the questions your customers ask, and note who gets named. Repeat regularly, because answers change.

A candid note on expectations: nobody can guarantee a ranking or a recommendation, in Google or in any AI tool. Anyone who promises one is guessing. What you can do is give every engine the clearest, best-supported case for choosing you, and then measure whether it is working.

What else do people ask about SEO, AEO and GEO?

Are AEO and GEO just marketing labels?

Largely, yes. They describe substantially the same work under two names, which is why the useful question is what a vendor actually does rather than which acronym they use.

Which one gets customers fastest?

For most local businesses, fixing the facts that both rely on. Profile completeness, consistency and clear service pages move ranked results and AI answers at the same time.

Do I need three separate budgets?

No. Treat it as one programme with shared fundamentals, then decide whether to spend extra on link acquisition or on third-party corroboration.

Will SEO still exist in five years?

Search will, in some form, and so will the work of being findable and clearly described. The surface changes faster than the fundamentals do.

Where do I start if I want to know how AI sees my business today?

Start by finding out whether AI tools already mention you, because that tells you which of the three layers needs the most work. Our free 60-second check looks at your site the way AI engines do and shows where the gaps are.

If you want the ongoing work handled, Alphaa is an AI agent that works to get local businesses recommended by ChatGPT, Gemini, Claude and Perplexity. Every week it asks those four AIs your customers' questions and reports who got named, checks 23 things AI reads on your site, and drafts the fixes, such as FAQ pages, structured facts and an llms.txt file, for you to approve with one tap. It starts from $99 a month, month to month. There is no free trial, and no guaranteed rankings, but the free check will show you where you stand first.