SEO vs. GEO vs. AEO: What's the Difference and Which Do You Need?

SEO gets your pages ranked in Google. AEO (answer engine optimization) gets them picked as the direct answer in featured snippets, People Also Ask and AI Overviews. GEO (generative engine optimization) gets your brand cited by ChatGPT, Perplexity, Gemini and Claude. Google itself says that optimizing for generative AI search is "still SEO", so treat AEO and GEO as layers on top of a healthy SEO foundation, not as separate jobs.

Not sure how your site shows up in Google and AI answers? Get a free video review of your site from the Indexed team.

The search industry can't agree on what to call the shift happening right now. Some say SEO is dead and GEO is the future. Others argue AEO is the real term. Google's own Danny Sullivan says good SEO is good GEO, while Andreessen Horowitz has declared the end of SEO entirely. We see the confusion with clients every week, so this guide breaks down what each term means, what Google actually says about them, and what to do first.

Watch: SEO vs AEO vs GEO, the complete guide

Jump to a chapter:

• 0:03 SEO, AEO, GEO: what each one means
• 5:33 SEO isn't dead. It's the entry ticket
• 8:04 Three acronyms, one strategy
• 15:17 AEO: be the answer, not a link
• 18:12 GEO: be the one AI recommends

What is SEO?

Search engine optimization is the work of getting your pages crawled, indexed and ranked in organic search results on Google and Bing, so the right people find you when they search for what you sell or for your brand name. It has been the main way to earn unpaid search traffic for over two decades, and it remains the foundation of digital discovery.

SEO works by aligning your site with the signals search engines use to rank pages. Those signals fall into three broad groups: technical health (can Google crawl and index your pages), content relevance (does your page answer the search better than the alternatives) and authority (do other credible sites link to and talk about you). BrightEdge research shows that organic search still drives 53% of all website traffic.

The results page around those rankings has changed, though. Google now shows AI Overviews, featured snippets, People Also Ask boxes and video carousels, and ranking first no longer guarantees the clicks it once did. According to Semrush, 60% of Google searches now end without a click to any website. That shift is why AEO and GEO entered the conversation.

How you measure it: rankings, clicks and impressions in Google Search Console.

What is AEO?

Answer engine optimization is the work of getting your page chosen as the direct answer to a question: the featured snippet, a People Also Ask answer, a voice result or a supporting link in Google's AI Overviews. Where SEO aims for a position in a list, AEO aims to be the one answer shown.

AEO predates GEO by several years. It started with featured snippets and voice assistants like Siri, Alexa and Google Assistant. When someone asks "what is domain authority?" and Google shows a short paragraph above the results, that's AEO at work.

Answer first, explain second

The fastest way to be picked as the answer is to answer. Take the exact question people ask, put it in a heading, and answer it plainly in the first two sentences. Then expand. Imagine asking a friend what day it is and getting a run-through of how Monday, Tuesday and Wednesday went before they finally say "Thursday". Long build-ups like that don't help readers, and they don't get lifted into answer boxes either.

A practical way to find the right questions: ask your sales team for the five questions customers ask most, turn each one into a heading, and answer it directly in the first two lines. These are questions real buyers are asking, and you're answering them faster than anyone else.

AEO matters most for questions with clear answers: pricing, definitions, comparisons and "how to" searches. Semrush found that 88% of queries that trigger AI Overviews are informational, which means they are exactly the kind of questions AEO is built for.

How you measure it: which featured snippets, People Also Ask answers and AI Overviews show your page for your target questions.

What is GEO?

Generative engine optimization is the work of getting your brand named or cited in answers from AI assistants such as ChatGPT, Perplexity, Gemini and Claude. Unlike SEO, which targets a position in a list of links, GEO targets inclusion in the AI-written answer itself.

The term comes from a 2023 research paper led by researchers at Princeton. They found that GEO methods can boost a source's visibility in generative engine responses by up to 40%, and the best-performing methods were simple ones: citing sources, adding quotations and adding statistics.

What gets a brand cited by AI

• Facts backed by sources: numbers, statistics and quotes from credible people, linked to where they came from.
• Your own data: results, benchmarks or research from your own work that AI can't find anywhere else.
• Clear structure: tables, bullet points and short sections that are easy to read and quote.
• Plain facts about your business: prices, services and locations written as text on your site, not hidden in images or PDFs.

Your own website matters more than you might think. In an Ahrefs study of 66.6 million free, logged-out ChatGPT responses, only about 1 in 7 (14.4%) contained web search queries. When ChatGPT did search a single website with the site: operator, three in four of those searches across the most-searched sites went to a brand's own site. If your pages carry outdated numbers or vague claims, that's what AI repeats.

When we work with clients at Indexed on AI SEO strategy, the quickest wins usually come from replacing vague claims like "trusted by industry leaders" with real numbers, named sources and linked case studies.

How you measure it: ask ChatGPT, Claude, Perplexity and Gemini the questions your buyers ask, and track how often they mention or cite you.

How do SEO, AEO and GEO compare?

The simplest way to see the difference is by what each one aims for. SEO is a ranking game: appear as high as possible in a list of results. AEO is a selection game: be chosen as the single best answer. GEO is a citation game: be referenced as a credible source in an AI-written response.

What does Google say about AEO and GEO?

Google's guide to optimizing for generative AI features answers this directly. From Google Search's perspective, optimizing for generative AI search "is optimizing for the search experience, and thus still SEO". Its AI features are rooted in the same core ranking and quality systems as regular search.

Three points from Google's documentation matter most:

• No index, no AI link: Google's page on AI features and your website says that to be eligible to show as a supporting link in AI Overviews or AI Mode, a page must be indexed and eligible to be shown in Google Search with a snippet. There are no additional technical requirements.
• Skip the "AEO/GEO hacks": for Google Search, Google says you can ignore tactics like "chunking" content, creating AI text files such as llms.txt, and pursuing inauthentic mentions.
• No special schema: structured data isn't required for generative AI search, and there's no special schema.org markup to add. Google still recommends structured data as part of normal SEO, because it helps pages qualify for rich results.

Google also points site owners to the Generative AI performance report in Search Console to see how content performs in its AI features. ChatGPT, Claude and Perplexity work differently from Google, but the foundation they rely on, crawlable pages with clear and credible information, is the same.

Ranking alone no longer gets you cited

A strong foundation is necessary, but a top-10 ranking is no longer the whole story. Ahrefs found that about 76% of pages cited in AI Overviews also ranked in the top 10 in July 2025. In its March 2026 update, covering 863,000 keyword results and 4 million AI Overview URLs, that share had fallen to about 38%. AI systems are pulling from a wider set of sources, and how useful a page is to the person asking matters as much as where it ranks.

A quick test: open one of your main service pages and list the top three follow-up questions a buyer would have. If the page doesn't answer them, it needs an update, whether or not it ranks.

Where do GEO and AEO overlap?

In practice, the line between GEO and AEO is thin. Both aim to make your content easy for machines to read and credible enough to be surfaced by AI systems. Some practitioners, including those at Profound, argue they are functionally the same thing, and Forbes has argued the industry should stop using the term GEO altogether.

The distinction is still useful for planning. AEO handles the extraction layer: making a specific answer easy to lift. GEO handles the authority layer: making your brand credible enough to be cited in a longer, synthesized response. A page can win a featured snippet and still be left out of an AI answer if it lacks the depth and sources AI systems look for.

Why the "SEO vs GEO" debate misses the point

Search Engine Land has argued that the whole SEO vs GEO framing is a false choice, and Google's own guidance now says the same thing in plainer terms. Your buyers don't stay on one platform. They might Google a comparison, ask ChatGPT for a recommendation and read a Reddit thread before they decide. Each of those is a different way of being found, but they all serve one goal: making sure your brand shows up when someone is looking for what you offer.

The answer isn't to choose between SEO and GEO. It's one visibility strategy that covers every place your buyers look. At Indexed, we call this the Full-Stack Search Method, because it treats search as one system with several outputs rather than separate channels competing for budget.

Which do you actually need?

Every business needs SEO. Without crawlable, indexed pages and real authority, nothing else works. The question is how much extra attention AEO and GEO deserve on top of that foundation, and that depends on how your buyers search.

Five things to do this month

You don't need three separate workstreams. These five steps cover SEO, AEO and GEO at once, in the order we'd do them:

1. Check that your 10 most important pages are indexed. In Google Search Console, open the Page indexing report and check your service, pricing and main product pages. If one isn't indexed, paste its URL into the URL Inspection tool, which tells you why. Fix the reason, then request indexing. If you're not sure where your site stands, an SEO audit is the right starting point.
2. Turn your five most-asked buyer questions into headings. Answer each one in the first two sentences, then add the detail.
3. Swap vague claims for numbers and sources. Check three of your money pages for lines like "trusted by leaders worldwide" with nothing behind them, and replace them with real figures, citations and links to case studies.
4. Put your prices, services and locations in plain text. Make the basic facts about your business easy for people and AI to read and quote.
5. Once a month, check what AI says about you. Alongside Search Console and Google Analytics, ask ChatGPT, Claude, Perplexity and Gemini the three or four questions your buyers ask before they buy. If you're not being recommended, go back to steps 1 to 4.

What you can skip

For Google, you don't need an llms.txt file, special schema for AI or content chopped into "chunks". If an agency tells you that fixing your llms.txt or adding AI schema is the most important thing to do first, ask them what they'll do about your content and your reputation online instead. Those are what move visibility. Keep using structured data as part of normal SEO, because it helps with rich results, but don't expect it to get you into AI answers on its own.

One thing we'd still do, even though Google doesn't require it: keep answers self-contained and near the top of each section. If the answer to a heading's question only arrives at the end of four paragraphs, it's harder for anyone, human or AI, to lift.

What does this mean for SEO budgets?

The good news is that AEO and GEO don't need entirely separate budgets. Most of the work overlaps with what a strong SEO program already does. The extra investment is in content structure (answers that are easy to lift), credibility (real numbers, sources and your own data) and measurement (tracking AI mentions alongside rankings).

According to Semrush, AI search traffic may surpass traditional search traffic by 2028. Businesses that build these habits now will have a compounding advantage, and those that wait face the same catch-up problem as companies that delay SEO: the cost of inaction compounds over time.

FAQ

What is the difference between SEO, AEO and GEO?

SEO gets your pages ranked in search results. AEO gets them picked as the direct answer in featured snippets, People Also Ask and AI Overviews. GEO gets your brand cited in answers from AI assistants like ChatGPT, Perplexity, Gemini and Claude. Google treats all three as SEO, because they rely on the same foundation of crawlable, indexed, useful pages.

What is generative engine optimization (GEO)?

Generative engine optimization is the practice of making your content and brand easy for AI assistants to find, trust and cite. The term comes from a 2023 research paper, which found that citing sources, adding quotations and adding statistics were among the most effective ways to raise a source's visibility in AI answers.

What is AEO in SEO?

Answer engine optimization (AEO) is the practice of structuring content so search platforms can lift it as the direct answer to a question. In practice, that means putting the question in a heading, answering it in the first two sentences and then expanding.

Do I need a separate GEO strategy from my SEO strategy?

Not for Google. Google's guidance says optimizing for its generative AI features is still SEO. Other AI assistants work differently, so it's worth checking monthly what they say about you, but the work that helps you there (clear facts, real sources, your own data) is part of good SEO anyway.

How do I get my website to show in Google AI Overviews?

To be eligible as a supporting link in AI Overviews or AI Mode, a page must be indexed and eligible to be shown in Google Search with a snippet. Google says there are no extra technical requirements. From there, pages that answer the question directly, with credible and useful information, give themselves the best chance. Meeting the requirements doesn't guarantee that Google will show a page.

Do I need an llms.txt file or special schema for AI search?

Not for Google. Google says you don't need AI text files like llms.txt or special schema.org markup to appear in its AI features. Structured data is still worth using for rich results as part of normal SEO.

Does ChatGPT use my website for answers?

It can. In an Ahrefs study of 66.6 million free, logged-out ChatGPT responses, most didn't search the web at all, but when ChatGPT searched a single site, three in four of those searches across the most-searched sites went to brand websites. Keeping your own pages accurate and up to date matters.

Is traditional SEO still worth investing in?

Yes. Organic search still drives 53% of all website traffic according to BrightEdge research, and Google's AI features are built on its core search systems. A page that isn't indexed can't appear as a link in AI Overviews at all.

What we covered

SEO, AEO and GEO are three layers of the same goal. SEO gets you found, AEO makes you the answer and GEO gets you recommended by AI. Google treats all three as SEO, so start with the foundation: indexed pages, direct answers and claims you can back up. Then check, every month, what AI says about you.

If you want to know where your site stands in Google and AI answers, get a free video review from the Indexed team.

Related reading

Continue exploring this topic with these related articles from Indexed:

• Quick SEO Growth Is An Expensive Mistake
• Are AI Overviews Killing Organic Clicks? | The Data
• How AI Search Is Reshaping Brand Visibility Online
• Generative Engine Optimization (GEO) | AI Era Guide
• Is Traditional SEO a Risk in the AI Era? | Find Out

Related service: looking to outsource this? See our GEO agency.