AEO vs SEO: What Changes When AI Answers the Question
For twenty years, search marketing had one scoreboard: where does your page rank? That scoreboard still matters. But a growing share of questions now get answered before anyone clicks a link — in Google’s AI Overviews, in ChatGPT, in Perplexity, in Gemini.
That’s where Answer Engine Optimisation (AEO) comes in. This guide explains what actually changes, what doesn’t, and what to do about it.
What is SEO?
Search engine optimisation is the work of getting your web pages to rank in search results for queries your customers type. It covers three broad areas:
- Technical — can search engines crawl, render and index your pages?
- Content — does the page satisfy the intent behind the query better than alternatives?
- Authority — do other reputable sites link to and mention you?
Success is measured in rankings, organic clicks and the leads or sales those clicks produce.
What is AEO?
Answer Engine Optimisation is the work of getting your content and brand used in the answer when an AI system or search feature responds to a question directly. That includes Google AI Overviews, featured snippets, voice assistants and generative AI tools such as ChatGPT, Perplexity, Gemini and Claude.
You’ll also see the term GEO (Generative Engine Optimisation), usually for the generative-AI side of the same work. In practice, most teams treat AEO and GEO as one discipline.
AEO vs SEO: side-by-side
| SEO | AEO | |
|---|---|---|
| Goal | Rank pages in results | Be named and cited inside the answer |
| Where it shows | Blue links on results pages | AI Overviews, ChatGPT, Perplexity, Gemini, voice |
| Unit of competition | The page | The passage, fact or brand mention |
| Main metrics | Rankings, clicks, organic conversions | Mention rate, citation rate, answer accuracy |
| What it rewards | Relevance, links, technical health | Direct answers, entity consistency, trusted third-party mentions |
| Content style | Comprehensive page for a keyword | Answer first, then tables, steps and sourced facts |
What stays the same
The good news: most of what makes SEO work also makes AEO work.
- Crawlability. If a bot can’t read your page, it can’t quote it. Many AI crawlers don’t execute JavaScript, so content that only appears after client-side rendering may be invisible to them.
- Helpful, original content. Thin pages that rehash competitors don’t get ranked — or quoted.
- Authority. Brands that reputable sources mention and link to are more likely to rank and more likely to be named in answers.
What changes
1. The passage matters more than the page
AI systems extract the most relevant passage and summarise it. A page that buries its answer under 400 words of introduction is harder to quote than one that answers in the first two sentences. That’s why we open key pages with a 40–60 word direct answer.
2. Your brand is an entity, not a keyword
AI answers name brands. To be named correctly, systems need consistent facts about you: who you are, what you do, where you operate. If your website, Google Business Profile, LinkedIn and directory listings all describe you differently, you make that harder.
3. Third-party mentions carry more weight
When ChatGPT or Perplexity recommends “agencies that do X”, it often draws on lists, reviews, forums and articles written by others. Your own site is one input among many.
4. Measurement is different
You can’t check AI visibility in Search Console alone. You need prompt tracking: a fixed set of real buyer questions, run regularly across AI platforms, recording whether you’re mentioned, whether you’re cited, and whether the description is accurate.
A practical AEO checklist
- Write one canonical brand description and reuse it everywhere.
- Open every key page with a direct answer to its main question.
- Use question-style H2s that mirror how buyers ask.
- Put comparisons in real tables and processes in numbered lists.
- Add Organization, Service, FAQPage and Article schema generated from page content.
- Server-render important content so bots that don’t run JavaScript can read it.
- Allow the AI crawlers you want in robots.txt and publish an llms.txt file.
- Show named authors and visible “last updated” dates.
- Earn mentions on the third-party sites AI tools cite in your category.
- Track a set of buyer prompts monthly and act on the gaps.
So, which should you invest in?
Both — and ideally with one team. SEO without AEO leaves you ranking but unnamed in the answers your buyers read first. AEO without SEO has nothing solid to build on.
If you want to know where you stand today, our free AI visibility audit shows how four AI platforms answer questions in your category, and who they name.
Frequently asked questions
Is AEO replacing SEO?
No. AI answers lean heavily on pages that are already crawlable, indexed and trusted, so SEO remains the foundation. AEO adds a layer focused on being quoted and named inside the answer.
What is the main difference between AEO and SEO?
The goal. SEO aims to rank a page in the results list; AEO aims to have your content and brand used in the answer itself, measured by mentions and citations rather than rankings.
Do I need a separate AEO agency?
Not necessarily. The work overlaps so much with SEO that one team should usually own both. What matters is that someone measures AI visibility directly, with prompt tracking, rather than assuming rankings tell the whole story.