The enhanced Gmail authentication method involves users entering a username and password and then going through a short process to set up a system so that they can receive one-time verification codes via SMS from Google. Users also can use an app for their smartphones that will generate the codes for them. Until now, the system only had been available to Gmail users in English-speaking countries. Google: “There s never been a better time to set it up: Examples of password theft and data breaches constantly remind us to stay on our toes”””
Source: https://threatpost.com/google-enables-gmail-two-factor-security-150-countries-072811/75487/