Continuation is the ability to contribute to a single BAM activity from different applications by using two different unique identifiers as the ActivityID. For example, in one part of a business process, a customer’s PO number might be used to track an activity. In another part of the process, an internal order fulfillment number might be used to track the same activity. You could enable continuation and relate the PO number and the order fulfillment number, so that both parts of the process could add information to the same activity.