SEO vs AEO vs GEO vs SXO.
Each term describes a different layer of the discovery stack. You need all of them. In plain English:
- SEO
- Search Engine Optimization. Ranking pages in Google and Bing's traditional results. Still important - it's the layer that feeds everything above it - but it no longer captures the full journey.
- AEO
- Answer Engine Optimization. Earning the featured snippet, the People-Also-Ask box, the Google AI Overview, and the voice-assistant response. When a user gets an instant answer, AEO determines whose answer it is.
- GEO
- Generative Engine Optimization. Being cited inside the outputs of ChatGPT, Perplexity, Gemini, Claude, Grok, and DeepSeek. Different engines retrieve from different source indexes - so the same page can be cited by one and ignored by another.
- SXO
- Search Experience Optimization. The meta-discipline. SXO audits all three layers as one system, because the same technical and editorial choices move all of them at once. You do not buy three audits. You buy one.
What each practice actually optimizes.
| Dimension | SEO | AEO | GEO | SXO |
|---|---|---|---|---|
| Primary surface | Google / Bing SERP | Featured snippets, AI Overviews, voice | ChatGPT, Perplexity, Gemini, Claude, Grok, DeepSeek | All of the above - measured together |
| Success signal | Ranking & click-throughs | Answer ownership | Citation share | Presence across the buyer's full journey |
| Core levers | Technical, content, links | Structured content, schema, entity clarity | Third-party authority, content freshness, retrieval-friendly structure | All levers, prioritized by cross-engine impact |
| What it misses alone | AI answers. Zero-click journeys. | Generative citations outside Google. | Traditional conversion traffic. | - (designed to miss nothing.) |
The ten blue links are not gone. They have just moved under a paragraph written by a machine.
"Just do good SEO" is no longer a defensible strategy.
Good SEO is necessary. It is not sufficient. Three shifts make SXO the level at which work has to be planned now:
- The SERP is the answer. With AI Overviews on a growing share of informational queries, the click you used to own is now a paragraph - and the paragraph may or may not mention you.
- Users are defecting to generative engines. A category of high-intent buyer now starts in ChatGPT or Perplexity. If your audit stops at google.com, you're blind to that channel.
- The retrieval layer has its own rules. LLMs don't just read your site - they read YouTube transcripts, Wikipedia, Google Business Profile listings, and Google Knowledge Graph entries. Your citation share is decided there as much as on your own domain.
SXO vs SEO: common questions
Is SXO the same as SEO?
No. SEO is one layer of SXO. SEO optimizes for ranking in Google and Bing's classic results. SXO (Search Experience Optimization) optimizes for the whole search experience - classic results, AI Overviews, and AI assistants like ChatGPT and Perplexity - and measures them as one system. SEO feeds SXO; it does not cover it.
Does SXO replace SEO?
No. SXO is built on top of SEO, not instead of it. AI answers still run on the search index, so crawlability, indexing, and ranking remain the foundation. What SXO adds is the layer above ranking: being the source an answer engine actually cites. More on that in does AI search replace SEO.
What does SXO stand for?
Search Experience Optimization. It is the meta-discipline that audits SEO, AEO (answer engine optimization), and GEO (generative engine optimization) together, because the same technical and editorial choices move all three at once.
What is the difference between SXO, AEO, and GEO?
AEO is earning the answer in Google's own surfaces: featured snippets, the People Also Ask box, and AI Overviews. GEO is being cited inside generative assistants like ChatGPT, Perplexity, Gemini, Claude, Grok, and DeepSeek. SXO is the umbrella that plans and measures SEO, AEO, and GEO as one system rather than three disconnected projects.
Is SXO worth it if my SEO is already good?
Often yes. Good SEO gets you ranked, but a page can rank well and still never be cited in an AI answer - Ahrefs found only about 38% of AI Overview citations also rank in the top 10. If buyers increasingly read an AI answer instead of clicking, strong rankings alone can leave you out of the conversation. The rank-but-not-cited gap is exactly what SXO checks and closes.
Find out whose answer the engines are giving.
One report tells you exactly where you win, where you lose, and which three changes move the most surfaces at once.