Silo Structure.
Learn what Silo Structure means in modern search and SEO.
An information architecture approach that organises website content into clearly defined topic clusters with controlled internal linking between silos.
A silo structure groups related pages into thematic clusters (silos), with internal links flowing strongly within each silo and minimal cross-silo linking. The architecture concentrates topical relevance signals on category hub pages, reinforcing each silo's authority for its specific subject in the eyes of search engines.
Physical vs Virtual Silos
Physical silos enforce structure through URL hierarchy (e.g., `/seo/on-page-seo/`, `/seo/technical-seo/`). Virtual silos achieve the same topical concentration through controlled internal linking regardless of URL structure—hub pages link to all cluster pages; cluster pages link back to the hub but not across to other silos.
Silo Structure vs Flat Architecture
Flat site architectures prioritise click depth—keeping every page within 3 clicks of the homepage—while silos prioritise topical concentration. Large e-commerce sites and enterprise content hubs often combine both: a flat overall structure with thematic internal linking clusters that simulate silo behaviour for the most commercially important topic areas.
Articles about Silo Structure
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