When you sign up for a Facebook account, Facebook assigns your profile with an ID number. Facebook will also prompt you to create your own custom user name, which will display on your Facebook page as ...

Every Facebook user has a unique ID number. This number gives you some information on approximately -- but not precisely -- when you and your friends joined Facebook relative to each other. A lower ...

Take this simple precaution to keep your chats private. Photo: Lewis Wallace/Cult of Mac Facebook Messenger’s new App Lock feature lets you add an extra layer of security to the popular chat app.