The term is often used interchangeably with 'pillar and cluster,' and functionally they describe the same architecture: a broad overview page, linked bidirectionally to a set of focused deep-dive pages, all reinforcing the same core topic to search engines through internal linking. The model works because it solves two problems at once — it gives users a clear path from a general overview into the specific depth they need, and it concentrates topical signals in a way that helps establish topical authority, since a search engine can see a cluster of connected, mutually-reinforcing content rather than isolated, disconnected articles. Building a hub-and-spoke structure deliberately (planning the full spoke list before writing) tends to produce more complete, cannibalization-free coverage than adding related posts ad hoc and linking them together afterward.
Example
A 'GEO' hub page links out to spoke articles on llms.txt, AI crawlability, AI Overviews, and Retrieval-Augmented Generation — each spoke linking back to the hub and to its most relevant sibling spokes.
Related terms
Related Reading
404 Error
A 404 error is the standard HTTP status code returned when a requested page doesn't exist on the server — the classic 'page not found' response.
A/B Testing (SEO)
A/B testing in SEO is the practice of showing two versions of a page element — usually a title tag, meta description, or on-page element — to see which one earns a better click-through rate or ranking outcome.
AI Citation
An AI citation happens when an AI assistant like ChatGPT, Perplexity, Claude, or Gemini references or links to a specific page as the source for part of its answer.


