A new feature we just enabled for better security is Two-Factor Authentication.
If you go into your settings page, you will see an option to enable two-factor authentication, which will send a unique token to your specified phone number as a text message when ever you log in.
You will have to then enter this token into a page in order to continue.
This helps prevent unauthorized access to your account, and gives you that extra piece of security.
As always, this is an optional setting, you can choose not to enable it.