Tasks are activities performed by the system that occur on an object of the vCenter Inventory (to power on or power off a VM, for example) and can be executed in real-time or be scheduled.
The task list can be viewed in the vSphere Client by selecting the Tasks option from the menu. The list displays all tasks that occurred to a specific object, detailing information, such as the target, status, initiator, and more. By default, tasks listed for a single object also include tasks executed on the child objects. The list can be filtered by typing the keywords in the search field on the right.