2-step verification adds an extra layer of security to your Google Account. 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.
Is two step verification safe in Gmail?
When you sign in, 2-Step verification helps make sure your personal information stays private, safe and secure. In addition to your password, 2-Step verification adds a quick second step to verify that it's you. 2-Step verification is a proven way to prevent widespread cyberattacks.