If you have a Facebook account, then chances are you access it on more than one device. You might forget from time to time to sign out of sessions on other machines you don't intend to use again, such as those in schools or at the workplace, potentially handing over access to your Facebook account to the next person(s) who uses the machine.
Facebook fortunately comes with a feature that lets you sign out of all active sessions on your account with just a few taps. We'll show you how you can do this in this tutorial.