Facebook is equipped with various security and privacy settings that you can use to make the pages and groups you run completely private. You can, for example, limit participation to a certain age group, prohibit others from posting on your page or set your group’s visibility to Secret so that only those invited to join can find it. These same privacy settings are also effective for hiding the pages and groups that you have personally liked from the view of other Facebook users. Writer Bio

How to Make Your Facebook Pages and Groups Completely Private - 45