Multi Approval notification informs users when there are items that require their approval as part of the multi approval functionality. See Multi-Approval Configuration.
If Dayforce is configured so that time recorded against a specific project needs to be specifically authorized, it can send the notification to the users who approve the project time informing them that time is logged against the project that needs to be authorized.
Dayforce sends the notification to any subscribed user that belongs to an approval group if there exists any unauthorized time that contains a labor metric their approval group can authorize.
This notification requires you to schedule the Multi Approval Alert background job. See Multi Approval Alert.