Queues by default will sort callers with a first in, first out order. The Queue Priority module allows you weight some callers differently from others. By giving certain callers a higher priority, they are allowed to bypass all of the other callers with a lower priority to receive faster service. The default setting is for all callers to have a priority of zero. Callers with a higher number will be placed in front of priority zero callers. Queue priorities are often used when providing service level agreements (SLAs).
The Queue Priorities Module adjust a callers priority when entering a queue to move them up in line.
See the User Guide