This policy setting disables all add-ins for the specified Office 2010 applications. If you enable this policy setting, all ...

This policy setting disables all add-ins for the specified Office 2010 applications.
      
If you enable this policy setting, all add-ins for the specified Office 2010 applications are disabled.

If you disable or do not configure this policy setting, all add-ins for the specified Office 2010 applications are allowed to run without notifying the users.