Facebook Login Alerts is a great feature that helps you improve the security of your account. Once you enable it, you will be notified when someone tries logging into your account from an unrecognized device or browser.
Gmail is one of the most widely-used free email clients in the world. A Google account gives you access to Google products like Gmail, Google+, YouTube, etc. Here's how to log into your Gmail account on the web, iOS, and Android.