While assigning an Application to an entity, you can either assign the latest version of an application package or a specific version of the application package. The assignment types are: Marker and Package.

At a time, only one assignment type (Marker or Package) can be selected while assigning the application package to the entity.

Marker
The Application Package marked as CURRENT is assigned to the entity. CURRENT implies that the entity always receives the latest version of the application package.
Package
A specific version of the Application package is assigned to the entity. The entity receives only this assigned version.