The Metadata Manager Service is an application service that runs the Metadata Manager application and manages connections between the Metadata Manager components.
Use Metadata Manager to browse and analyze metadata from disparate source repositories. You can load, browse, and analyze metadata from application, business intelligence, data integration, data modelling, and relational metadata sources.
You can configure the Metadata Manager Service to run on only one node. The Metadata Manager Service is not a highly available service. However, you can run multiple Metadata Manager Services on the same node.