Google Authenticator is a mobile application made by Google that implements two-step verification. Authenticator provides a six to eight digit one-time password which users must provide in addition to their username and password to log into an application.
This page refers to using Google Authenticator instead of Auth0 Guardian. Google Authenticator can also be used with Guardian (your users choose which to use) when Push Notifications is enabled. Click here for more information on Guardian.
Click the link below that most fits your role to learn more:
Google Authenticator for Administrators - this page explains how to enable/disable using Google Authenticator, how to reset accounts, supported devices and customization.
Google Authenticator for Developers - this page explains how to enable Google Authenticator and details on how to configure it to meet your needs.
Google Authenticator for Users - this page is for users logging into your application using Google Authenticator. It also has troubleshooting tips for any issues they may encounter.