Multiple users can track the work progress in line with their business processes.
You can see who is doing what at a glance.

This function is often used in apps for managing approval and final decision of requests (for managing request for approval, travel cost, vacation, etc) and in apps for managing tasks that involve multiple user engagement (for managing tasks, claims, etc).
Just by clicking buttons, you can confirm/approve requests, pass the flow to the next person, etc.