In the side menu, select Geofences, then Geofence Alerts.
The Create New Alert page (as shown below) will open.
Select the Geofence you wish to set up an alert on, then in the label box, give the alert an easily identifiable name.
From the Send Alert To dropdown box, choose who to send the alert to.
In the Asset movement box, choose which type of activity will trigger the Geofence alert.
Use the Email and App toggles to select how you would like the alert to be sent.
Press the blue Save button to create your alert.