[video=youtube;zMabEyrtPRg]http://www.youtube.com/watch?v=zMabEyrtPRg[/video] Why you should use 2-step verification 2-step verification adds an extra layer of security to your Google Account by requiring you to have access to your phone – as well as your username and password – when you sign in. In addition to your username and password, you'll enter a code that Google will send you via text or voice message upon signing in. 2-step verification drastically reduces the chances of having the personal information in your Google account stolen by someone else. Why? Because hackers would have to not only get your password and your username, they'd have to get a hold of your phone. How you sign in with 2-step verification Signing in with 2-step verification is easy. Go to the sign-in page and enter your username and password like you normally do. Then you’ll be asked for a six-digit code, which you'll get from your phone. If you want, when you enter your code, you can choose to remember your computer for 30 days -- this means you won’t be asked for a code again when you sign in from this computer for 30 days. If you sign in from another computer, however, you’ll be asked for a code. After you turn on 2-step verification, non-browser applications and devices that use your Google Account (such as the Gmail app on your phone or Outlook), will be unable to connect to your account. However, in a few steps, you can generate a special password called application-specific password to allow this application to connect to your account -- and don't worry, you'll only have to do this once for each device or application. source:Google account support i think it is a great way to stop anyone else from accessing your account