Confluence is a collaborative workspace by Atlassian that helps teams create, organize, and share documentation, meeting notes, product specs, and knowledge bases. It provides a rich page editor, templates, page hierarchy and spaces for organizing content, inline comments and real-time collaborative editing, content versioning, and robust permissions and admin controls. Confluence integrates tightly with Jira and other Atlassian products, supports extensibility via apps from the Atlassian Marketplace and a REST API, and is offered as cloud-hosted or self-managed (Data Center) deployments for enterprise governance and scale. Its value lies in centralizing team knowledge, enabling asynchronous collaboration, and connecting documentation to development workflows.