The App object is used to create a reference to an innovaphone App that can be used in myApps. App objects can also be used for accepting incoming app websocket connections to the PBX with the configured credentials.
Note that each app needs specific settings depending on the needed or provided features. See the app documentation to find out what checkmarks should be set.
Find a functional description of the individual configuration options here Reference14r1:Concept_Apps#App_Objects_Parameters.