Perhaps at your college lab or your workplace they would want to ensure the same experience or management of SketchUp no matter where you are logged in.  PolicyPak brings that possibility.  It can make sure that AutoSave always is turned on or that Check for updates is not checked by the user (Admins would roll out updates across all computers when necessary).  So if you are in the software management side of using SketchUp, this can be a handy way to keep the settings the way you need them.  The video explains more, but you do need to forgive them for saying Google rather than Trimble.