What is the status of a task when it has been assigned to a user...

When a task is assigned to a user in UiPath Action Center, its status changes to "In Progress." This status indicates that the task has been acknowledged by the user and is currently being worked on. Action Center is designed to facilitate human-in-the-loop scenarios, where human intervention is required to complete tasks that cannot be fully automated. The "In Progress" status helps track the progress of these tasks, ensuring that they are moving towards completion.

References:

UiPath Action Center Guide: Managing Actions

UiPath Action Center Guide: Task Statuses