In the Pillar and Cluster content model, what is a Pillar Page?

A Pillar Page is a comprehensive, high-level resource that broadly covers a core topic. It serves as the central hub for a cluster of related content, linking out to more detailed articles (cluster content) and receiving internal links back from them. This structure signals to search engines that the pillar page is an authoritative source on the topic, improving its search visibility. It's not necessarily the page with the most social shares, as social popularity doesn't define its structural role in content strategy. It's also distinct from a product listing page or a page primarily focused on advertising content, as its main purpose is to provide in-depth, informational value on a subject.