The new 2FA option two step verification in Google terminology – will add an extra layer of security in which users designate a mobile phone, landline or mobile app to receive a unique one-time login code. This is then entered in addition to the usual username and password combination. Supported mobile apps to received codes on include Android, iPhone and BlackBerry. Not clear how quickly the feature will be made available to all users that want it but the option will need to be turned on in the account settings tab.”]
Source: https://www.csoonline.com/article/2126994/google-adds-sms-verification-security-to-gmail.html