This menu option maps the name of an entity in the SEC database to a specific type of interface - SH, REST, SOAP, etc. An interface entity mapping makes an entity available on the related interface. For example, in the case of a REST interface, the data type seen within the URL of a REST request is mapped to the entity.
Example uses of interface entity maps:
Sh Interface Entity Map - mapping a data entity to the Sh interface makes the entity available to the Policy Management server.
REST Interface Entity Map - mapping a data entity to the REST interface makes the entity available to the provisioning systems.