Customer-facing help centers and knowledge bases that enable end users to find answers, troubleshoot issues, and complete common tasks without contacting support. Core capabilities include article authoring and publishing, category/section organization, search (keyword and increasingly semantic), feedback and rating mechanisms, SEO optimization for support content, analytics on search queries and content gaps, and embedding in product UIs or websites. The category reduces inbound ticket volume by making self-service the first resolution path before a human agent is involved.