Two step verification (2SV) also known as two factor authentication (2FA) has been widely used to add an additional layer of security for users to safeguard access to their accounts and web-based services. Major players like Google, Apple, Microsoft, Facebook, Amazon and Dropbox among others have been encouraging their users to enable this feature to keep their accounts safer.
There exist multiple ways that end users can approve sign-in requests via 2SV, by keying in a Security Key, by entering a verification code sent to their phone or a voice call. SMS two-step verification has become less reliable because hackers can take advantage of the vulnerability found in Signalling System Seven (SS7) that is used by carriers to exchange information to intercept any SMS message or call that one may get. Google Prompt is a new 2SV whereby users only approves or rejects a prompt that will pop up on their phone. Users no longer need to search through SMS messages and remember sometimes complex verification code.
However, some points are to be noted:
Google Apps Update