25%
Projected drop in traditional search engine volume by 2026.
Gartner, 2024
~60%
Of U.S. Google searches end without any click to the open web.
SparkToro, 2024
3.7B
Monthly visits to ChatGPT alone — new answer surface, new rules.
Similarweb, 2024
~13%
Of informational queries triggered Google AI Overviews at launch.
Semrush, 2024
The four acronyms
SEO vs AEO vs GEO vs SXO.
Each term describes a different layer of the discovery stack. You need all of them. Here is the plain-English version.
- 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, and Claude. Different engines retrieve from different corpora — 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.
Side by side
What each practice actually optimizes.
| Dimension | SEO | AEO | GEO | SXO |
|---|---|---|---|---|
| Primary surface | Google / Bing SERP | Featured snippets, AI Overviews, voice | ChatGPT, Perplexity, Gemini, Claude | 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.
The contrarian bit
"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 Reddit, YouTube transcripts, G2, SEC filings, and Wikipedia. Your citation share is decided there as much as on your own domain.
Ready to look
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.