The two-factor authenticator is an extra security measure taken by a user to secure their account. An authenticator will be needed where you scan the QR Code to generate codes. This is done using an authenticator service application such as Google Authenticator or Authy. Once the user enables the Two Factor Authentication(2FA) on their account, they'll only be granted access to the account when they input the correct code generated on the authenticator application.
The description below is how to set your 2FA on Peerwallet
P.S. Download Authy on your phone and set up an account.
For Android users visit: https://play.google.com/store/apps/details?id=com.authy.authy&hl=en&gl=US&pli=1
For IOS users visit: https://apps.apple.com/us/app/twilio-authy/id494168017
Congratulations! Your authenticator is active