A pillar page is a comprehensive page that covers a broad topic at a high level and links out to more detailed cluster pages on its subtopics. It acts as the central hub for a theme, giving readers an overview and routing them to the deeper supporting content.
For brands, pillar pages are a core building block of topical authority. By organizing a subject into one authoritative hub plus a set of focused supporting pages, you signal depth of coverage to both search engines and AI systems, and you create many extractable, citable answers across the cluster rather than relying on a single page to do everything.