Field help (AWPDES)

It defines the notification recipient. If an approval or a signature is expected, it usually is up to them to provide it.

This recipient is not necessarily the recipient who was defined in the original rule. Indeed, if the rule foresees a delegation to the first available recipient, and the original recipient has specified a delegate with authority for the concerned dates, the delegate will be the one to receive the notification (or their delegate if they have themselves designated a delegate...).