Set the notifications you would like to receive as a manager. You can choose to receive notifications as either an email or via 'push' notification sent directly to your smart phone.
Manager or Administrator permission
Account > Notifications
Set Manager Preferences
Choose to be notified about worker time off, swap and drop requests. If you manage a schedule that you don't want to receive notifications about simply remove it from the list.
This article explains how to set your own personal preferences.