Part of GEOly's "GEO / AEO Expert Watch" series · meet **Stephan Spencer**, a quick map of their public work and where to follow them — with links to the original sources.
Who is Stephan Spencer
Stephan Spencer is co-author of the O'Reilly classic The Art of SEO, and author of Google Power Search and Social eCommerce. He founded the SEO agency Netconcepts in 1995 and grew it internationally before selling it in 2010, and now works as a consultant, speaker, and podcast host (Marketing Speak and Get Yourself Optimized). His work centers on durable, fundamentals-driven SEO strategy.
What these experts share: they treat "can the machine crawl and correctly parse your content" as the first-principles question of GEO — and they answer it with experiments and data, not folklore. Their recurring focus areas include: Enterprise SEO, technical SEO, ecommerce SEO.
What GEO / AEO practitioners can learn from Stephan Spencer
- **Crawlability & parsing first**: many AI crawlers render worse than Googlebot, so server-side rendering, clean HTML and a clear heading hierarchy decide inclusion more than flashy JS. - **Structure is signal**: semantic markup and explicit entities/facts make it easier for retrieval systems to lift your passage — the heart of relevance engineering. - **Validate with experiments, not guesses**: treat every change as a testable hypothesis, judged by before/after citation and mention rates.
**GEOly angle**: A grounding reference for the evergreen SEO fundamentals that continue to matter through the GEO transition.
What it means for brands going global
For brands going global, the first gap is usually not creative — it is the technical foundation: make sure major AI crawlers can access you, that product and content pages carry stable structured data, and that key facts are readable as plain text. Only on that foundation can content and brand signals get cited.
Follow Stephan Spencer: homepage & socials
- [Website](https://www.stephanspencer.com) - [LinkedIn](https://www.linkedin.com/in/stephanspencer/) - [YouTube](https://www.youtube.com/@StephanSpencer)
To meet more experts across GEO, AEO and agentic commerce, visit the [GEOly author hub](/blog/author).
*This profile is an editorial compilation of publicly available information, curated by the GEOly team for industry learning and reference. All links point to the expert's own public pages. Contact us for any correction or removal.*
