SEO vs AEO vs GEO — What's Actually Different?
Search engine optimisation, answer engine optimisation, and generative engine optimisation overlap more than the acronyms suggest. Learn what each term means, what is shared, what is new, and where to spend your effort.
Short answer: SEO aims to rank pages in search results. AEO aims to have your content used as the direct answer to a question. GEO aims to have your brand mentioned and cited in answers generated by AI assistants. They share most of their foundations: crawlable pages, clear writing, and credibility. AEO and GEO add emphasis on answer-shaped content and on being mentioned across the wider web.
Table of Contents
- The Three Terms
- What They Share
- What Is Different
- What Changes in Practice
- How Measurement Differs
- Where to Put Your Effort
- Key Takeaways
The Three Terms
| SEO | AEO | GEO | |
|---|---|---|---|
| Stands for | Search engine optimisation | Answer engine optimisation | Generative engine optimisation |
| Target | Ranked links | Direct answers, featured snippets, voice results | AI-generated answers in assistants |
| Unit of success | A position and a click | Being the quoted answer | Being mentioned or cited |
| Typical surface | Search results page | Answer boxes, voice assistants | ChatGPT, Perplexity, Gemini, Copilot, AI summaries in search |
The terms are used loosely. Many people use AEO and GEO interchangeably, and some treat both as part of SEO. The labels matter less than understanding what each surface rewards.
What They Share
All three depend on the same base.
- Access. A system that cannot fetch your page cannot use it.
- Clarity. Content that states plainly what something is and who it is for.
- Usefulness. Pages that answer the question asked.
- Credibility. Signals that others trust you: links, mentions, reviews.
- Technical soundness. Fast, stable pages with consistent URLs.
- Structure. Headings, lists, and tables that make content easy to parse.
A site that does these well is most of the way to all three.
What Is Different
The output
Search returns a list and lets the user choose. An AI assistant composes a single answer and may name a handful of sources or brands. There are far fewer places to appear.
How information is gathered
AI answers draw on two sources: what the model learned in training, and pages retrieved live at the time of the question. For the first, a broad and consistent presence across the web matters. For the second, crawler access and answer-shaped pages matter.
The importance of mentions
Search engines weigh links. Assistants appear to be influenced by how often and how consistently a brand is described across many sources, including reviews, comparisons, forums, and directories, whether or not those link to you.
The click
In search, success normally includes a visit. In AI answers, a user may learn about you and never click. That changes how value is measured (zero-click searches).
Variability
A search ranking is fairly stable. The same question put to an assistant twice can produce different answers.
What Changes in Practice
| Practice | SEO | AEO and GEO addition |
|---|---|---|
| Page opening | Engaging introduction | A direct answer in the first two sentences |
| Structure | Headings for readability | Question-style headings, definitions, tables |
| Positioning | Brand tagline | A plain statement of what you are and for whom |
| Off-site | Backlinks | Mentions in reviews, comparisons, communities |
| Facts | On your site | Consistent everywhere they appear |
| Structured data | Rich results | Machine-readable facts (schema guide) |
| Crawlers | Search bots | Also AI crawlers, checked at the CDN (how to check) |
Detail on the writing side: how to write content AI assistants cite.
How Measurement Differs
| SEO | AEO and GEO | |
|---|---|---|
| Visibility | Rankings, impressions | Mention rate across a fixed set of prompts |
| Traffic | Organic sessions | Referrals from assistants, often small and partly hidden |
| Quality | Conversion from organic | Conversion from AI referrals, accuracy of how you are described |
| Stability | Fairly stable | Varies run to run; track trends |
Measurement for AI visibility is immature. Run a consistent prompt set monthly (measuring AI share of voice) and track AI referral traffic separately (how to track it).
DeepSync's AI visibility feature, on Business and Enterprise, reports which AI crawlers read your site, referral traffic from answer engines, and where your brand is mentioned for topics you choose.
Where to Put Your Effort
- Fix access first. Confirm search and AI crawlers can reach your pages.
- Fix technical basics. Consistent URLs, working canonicals, an honest sitemap.
- Write answer-first pages for the questions your buyers ask.
- State your positioning plainly and consistently.
- Earn mentions on sites your audience and the assistants trust.
- Measure both search and AI visibility, with modest expectations for the second.
Do not rebuild your strategy around a new acronym. Most GEO advice is good SEO with clearer writing and more attention to what others say about you.
Key Takeaways
- The three share access, clarity, credibility, and technical soundness.
- AI answers have fewer slots and weigh mentions across the web.
- Lead pages with direct answers and plain positioning.
- Measure AI visibility as a trend, not a fixed rank.
Conclusion
The acronyms multiply. The work stays recognisable: be reachable, be clear, be worth citing.
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