It unlocks all the DLC, including exclusive for the Playstation.
To install:
Unzip the files from the archive to the root folder of the game (... \ LEGO STAR WARS The Force Awakens).
The Empire Strikes Back Character Pack (DLC1)
The Jedi Character Pack (DLC2)
Jabba's Palace Character Pack (DLC3)
Droid Character Pack (DLC4)