What are the Experience Cloud site types and how do their licenses differ?

Experience Cloud supports three primary license types:

1. Customer Community — designed for B2C customer self-service. Users can access cases, Knowledge articles, and limited object records. Low cost; suitable for high-volume, limited-access portals.
2. Partner Community — designed for B2B channel partners. Provides access to Opportunities, Leads, Campaigns, and more. Supports PRM features like deal registration and market development funds (MDF). Higher cost than Customer Community.
3. Employee Community / Employee Apps and Portals — for internal employees accessing the portal. Uses Employee Community license; users have full standard object access comparable to internal users but via the Experience Cloud site interface. License choice dictates object access, page layouts, and cost per login or named user.