Facebook uses a security measure called Login Approvals that sends a verification code to your mobile phone each time you use a different computer or device to access your Facebook account.

And although Facebook's apps have different looks and features, they've got one thing in common: To use them, you need to log into your account. Luckily, logging into Facebook usually just ...

Using your Facebook and Google logins saves you the effort of having to keep track of a bunch of different usernames and passwords for each app you sign into ... monitor your account and flag ...