What is the purpose of the Service Management Facility (SMF) profiles?

Profiles are, in many ways, similar to manifests in that they use the same XML DTD. However, instead of providing information about a service, its dependencies, and methods, a profile is used to provide customization of a service or an instance of a service. Customizations include whether an instance of a service should be enabled or disabled and any modifications to service configuration properties.

Incorrect:

Not A: Manifests (not profiles) are used to describe services and instances of a service, including any property groups and properties they might have.