Domains let a tenant advertise one or more custom addresses through which users reach their branded experience. Rather than navigating to a generic platform URL, users can access their tenant through a domain that the organisation controls — for example, a subdomain of their own website or a purpose-built portal address.
Foundation (FND) is the module that provides shared services consumed by every other module in the platform. It owns no business domain of its own; instead it supplies the infrastructure and starter data that domain modules depend on.
Entitlements are the access and limit controls produced by Billing (PBM). When a tenant or customer subscribes to a plan, the subscription determines both what is billed and what the subscriber can use.