The Metadata Manager Service is an application service that runs the Metadata Manager web client in the Informatica domain. The Metadata Manager Service manages the connections between service components and the users that have access to Metadata Manager.
When you load metadata into the Metadata Manager warehouse, the Metadata Manager Service connects to the PowerCenter Integration Service. The PowerCenter Integration Service runs workflows in the PowerCenter repository to read from metadata sources and load metadata into the Metadata Manager warehouse. When you use Metadata Manager to browse and analyze metadata, the Metadata Manager Service accesses the metadata from the Metadata Manager repository.