Running a queue on demand:
Running a queue on demand processes the queue immediately. When running the queue like this, the queue services are not used.

Scheduling a queue:
Users also have the option to schedule a queue to be processed at a later time or recurring frequency. When a queue is scheduled, the queue services are used in processing and the queue will run and complete at the time scheduled. The following Knowledgebase goes over how to schedule a recurring queue.