Pillar Page
In one line
A pillar page is the hub at the centre of a topic cluster — a broad page on a large theme that interlinks with the narrower cluster pages around it.
Going deeper
A pillar page is the hub that covers a broad theme A, with cluster pages on the narrower sub-topics (a1, a2, a3) hanging off it. Every cluster page links back to the pillar, and the pillar links out to the clusters like an index. This topic-cluster model — popularised by HubSpot — has become the default way to architect SEO content.
The classic mistake is shipping a thin, long pillar — five thousand words that never answer any specific sub-question well. You end up with a page no human, search engine or LLM has any reason to quote. A real pillar is broad on purpose but tight on definitions, scope and entry-level guidance.
If anything, pillars matter more in AI search than they did before. LLMs answering category-level questions tend to favour a single well-organised page that maps the whole topic, so one strong pillar can quietly drive citations across many related prompts.
Related terms
Cornerstone Content
Cornerstone content is the small set of pages your site relies on most for traffic, conversions and citations — the load-bearing columns of the content house.
SEOEvergreen Content
Evergreen content is content that keeps earning search demand and value long after it goes live — pieces whose relevance comes from fundamentals, not from the news cycle.
SEOPrimary Keyword
The primary keyword is the single search term a page is built around — the one that the title, H1 and meta description should all consistently point to.
SEOAI Overview
Google AI Overviews is the AI-generated summary that appears above the standard results in Google Search — one of the most prominent zero-click surfaces today.
GEO·AEOGEO
GEO (Generative Engine Optimization) is the practice of optimizing content and data so that a brand gets cited and recommended inside generative AI search answers like ChatGPT, Perplexity and Google AI Overviews.
GEO·AEO