A WorkPro ID is a unique WorkPro identifier.
The purpose of a unique WorkPro ID is that once you have registered for WorkPro and completed any task within WorkPro, you have created a digital employment 'wallet'.
If you apply for another role, and that employer uses WorkPro, rather than repeating the same tasks, provide them your unique WorkPro ID. They will check your digital profile, and then only send you the tasks that remain outstanding, or you have not completed.
Thousands of companies use WorkPro, so make sure you keep the WorkPro ID handy - perhaps add it to your CV.
The idea is to complete tasks once, and share with multiple employers - saving you time and effort in being appointed for a new job or contract.