Duo mobile Push is the easiest and quickest way of authenticating. You'll get a login request sent right to your phone.

When the Duo mobile Push notification shows up on your screen, tap where indicated to view the available actions: Approve or Deny.

You can slide down your notifications to see more information about the login request before selecting an action, like the username, timestamp, and location information (if available).

Simply tap Approve in either type of notification to finish logging in to the Duo-protected application.

Tapping on the push request notification itself (instead of tapping the notification actions) takes you to the full Duo mobile Push screen in Duo mobile.

If you get a login request that you weren't expecting, tap Deny on the notification or the full Push screen to reject the request.

If you don't recognize the authentication attempt as your own, tapping It seemed fraudulent rejects the login attempt and also notifies your Two-Factor Authentication administrator about the suspicious request. If you just want to cancel a login request you made you can tap It was a mistake to deny the request without reporting it.