Facebook adds new Onsite Notification setting to fan pages
Facebook adds new Onsite Notification setting to fan page Admin Panel. Go to your fan page > Admin Panel > Manage Notifications (under the Edit Page drop-down menu).
Checking the Onsite Notifications box will give you instant notification when someone posts, likes, comments or sends you a message via your Page. It is the same type of notification you see on your personal profile (red circle with a number) under the globe icon on the top navigation blue bar.
Note: I had to refresh the page after saving to verify the new settings took.
Notifications are shown whether you’re using Facebook as yourself or your Fan Page.