Google 2-Step Verification
Google 2-Step verification is an excellent way to protect your Google account from hackers or suspicious logins. Similar to other websites that secure your personal data, 2-Step verification uses a variety of secure methods to verify that the person logging into your account is in fact you.
Native Google 2-Step verification includes the following options:
Code sent to your phone via text or phone call
Code generated on your phone via Authentication App (such as Google Authenticator, or Duo)
Your Mobile Phone - automated pop-up to verify identity (for iPhone requires Google App or Gmail App)
Security key that you can insert into your computer's USB port ( for example, Yubico Security Key )
Your phone's built-in Security Key (for iPhone requires Google Smart Lock app)
Backup single-use codes that you can save in a secured location for use when you won't have access to other methods of verification
NOTE: It is recommended to enable multiple options, to allow for situations when your first method of verification is not available
To get started, go to your Google account's Security center at: https://myaccount.google.com/security