Short answer: SEO (search engine optimisation) helps your pages rank in search results. AEO (answer engine optimisation) shapes your content so a system can lift a direct answer from it, for snippets, voice assistants and AI answers. GEO (generative engine optimisation) aims to get your brand cited and described correctly in AI-generated answers from tools like Google AI Mode, ChatGPT and Perplexity. They overlap heavily: SEO vs AEO vs GEO is less a choice than three layers of the same work.
SEO vs AEO vs GEO at a glance
| SEO | AEO | GEO | |
|---|---|---|---|
| Goal | Rank pages in search results and earn clicks | Be the direct answer to a specific question | Be cited and named in AI-generated answers |
| Where it shows | Google and Bing organic results | Featured snippets, voice assistants, AI answers | Google AI Overviews and AI Mode, ChatGPT search, Perplexity, Copilot |
| Main unit | The page | The passage or answer | The brand and its facts across the web |
| Key work | Technical health, content, links | Question-led structure, concise answers | Evidence, citations, entity consistency, mentions |
| How to measure | Rankings, clicks, organic conversions | Snippet wins, answer visibility | AI citations, AI referrals, prompt checks |
The boundaries are fuzzy, and different people use the terms differently. Some use AEO and GEO as synonyms. What matters is the work underneath, not the label.
What each term means
SEO: search engine optimisation
SEO is the foundation. Search engines need to crawl your pages, index them and judge them useful for a query. That depends on technical health (speed, mobile usability, clean URLs), helpful content written for people, and signals from other sites such as links and mentions.
AEO: answer engine optimisation
HubSpot describes answer engine optimisation as a content strategy that structures information so AI engines can extract, cite and surface it directly. The term is older than the current AI wave: it grew up around featured snippets and voice assistants, where one answer is read out or shown above the results. AEO is about format: a clear question, a short answer, then supporting detail.
GEO: generative engine optimisation
GEO comes from a 2023 research paper by researchers at Princeton and IIT Delhi. It focuses on visibility inside answers written by large language models. The paper found that adding citations, quotations and statistics improved visibility in its tests, while keyword stuffing did not. I explain it in full in what is GEO.
How SEO, AEO and GEO overlap
Think of them as layers. If the SEO layer fails, the others fail too.
- AI answers depend on search indexes. Google says there are no extra requirements for AI Overviews or AI Mode beyond being indexed and eligible to show with a snippet. ChatGPT search uses its own crawler, OAI-SearchBot, plus third-party search providers.
- Clear answers serve every layer. A page that answers a question in its first paragraph is easier to rank, easier to quote in a snippet and easier for an AI model to cite.
- Trust signals carry across. Reviews, links, author information and mentions on respected sites help rankings and also shape what AI tools say about you.
The main difference is the scope. SEO and AEO mostly work on your own pages. GEO adds a bigger focus on what the rest of the web says about your brand, because AI answers summarise many sources at once.
What to do for each
For SEO:
- Verify your site in Google Search Console and Bing Webmaster Tools, submit sitemaps and fix indexing errors.
- Make pages fast on mobile and easy to navigate, with descriptive titles and internal links.
- Build one strong page per topic instead of many thin pages.
For AEO:
- Use the real questions customers ask as headings.
- Answer in the first 40 to 60 words under each heading, then expand.
- Use lists, steps and tables for processes and comparisons.
- Add a short FAQ section to key pages, written for people.
For GEO:
- Allow search-focused AI crawlers such as OAI-SearchBot and PerplexityBot in robots.txt and at your CDN.
- Support claims with sources, real figures and named experts.
- Earn reviews and mentions on sites AI tools rely on: review platforms, industry directories, forums and press.
- Check what AI tools say about you every month. My guide on getting recommended by ChatGPT and AI search covers this step by step.
Structured data: FAQ, Article, Person and Organization
Structured data is code that tells search engines what a page is about in a standard format (schema.org). It does not guarantee AI citations, and Google says you do not need special markup for its AI features. But it removes ambiguity, which helps every layer.
- Organization: name, logo, URL, contact details and sameAs links to your official profiles. Google’s Organization markup guide says it helps Google understand your organisation’s details and can influence which logo it shows.
- Person: for consultants, authors and experts. Link your author page to your LinkedIn and other profiles with sameAs.
- Article: headline, dates and author, with the author linked to a real profile page. See Google’s Article structured data documentation.
- FAQPage: be realistic. Google stopped showing FAQ rich results in Search on May 7, 2026. Google’s John Mueller said existing markup causes no problems, so you can keep it, but do not add it expecting a visual boost in Google. The visible FAQ content itself is still useful for readers and AI answers.
Whatever markup you use, it must match what is visible on the page.
Entity consistency: the part most sites miss
An entity is a thing a search engine or AI model recognises: your business, your founder, your product. AI tools build their picture of you from many sources. If those sources disagree, the answer gets vague or wrong.
- Write one standard description of your business in two sentences: who you are, what you do, for whom and where.
- Use the same name, description, address, phone and website on your site, Google Business Profile, Bing Places, LinkedIn, Facebook and key directories.
- Create a clear About page and author pages, and link them in your Organization and Person markup with sameAs.
- Fix old listings with outdated names, addresses or services.
- Repeat the check every quarter, because directories and profiles drift.
What I recommend
Do not split your budget into three separate projects. Start with SEO fundamentals, because nothing else works without indexing. Then restructure your top 10 to 20 pages for AEO with direct answers. Then spend ongoing effort on GEO: entity consistency, reviews, third-party mentions and monthly AI checks. If you run paid search too, the same pages that answer questions clearly usually convert better from Google Ads traffic as well.
Frequently asked questions
What is the difference between SEO vs AEO vs GEO?
Is GEO replacing SEO?
Should I still use FAQ schema in 2026?
Which structured data matters most for AI search?
Who can help with SEO, AEO and GEO together?
Need help with SEO, AEO and GEO?
I’m Saifur Saif, a Google Ads & Meta Ads specialist who also works on SEO, GEO and AEO. I can audit your indexing, structured data and entity consistency, and check how AI tools describe your business today. If you also run ads, get a free ads audit and I will review both.
Sources
- Google Search Central: AI features and your website
- HubSpot: Answer engine optimization vs traditional SEO
- arXiv: GEO: Generative Engine Optimization
- Google Search Central: Organization structured data
- Google Search Central: Article structured data
- Search Engine Roundtable: Google drops FAQ rich results from Search