This document provides an overview of communities and user licensing in the Salesforce Community Cloud. It discusses the differences between customer community, customer community plus, and partner community user licenses. It also outlines several ways to share community data, including implicit sharing, sharing sets, share groups, and super user access. The document demonstrates how to set up a sharing set and activate a share group. It describes what high-volume community users can and cannot do and how partner and community plus super users can access additional data.