Specifies how a user receives notifications, for example about approval workflow steps. For more information, see How to: Specify When and How to Receive Notifications.
Many approval workflow steps are about notifying users that an event has occurred that they must act on. For example, on one workflow step, the event can be that User 1 requests approval of a new record. The related response is that a notification is sent to User 2, the approver. On the next workflow step, the event can be that User 2 approves the record. The related response is that a notification is sent to User 3 to start a process with the approved record. For workflow steps that are about approval, each notification is tied to an approval entry. For more information, see Workflow.