The General page of the Activities Properties window displays information about the selected UCM activity.
An activity is a UCM object that tracks versions created while working on a development task. An activity includes a text headline, which describes the task, an ID, which is the unique identifier of the activity, and a change set, which identifies all versions that you create while working on the activity.
Activities are associated with a stream. You can move versions from an activity change set to an activity in another stream, but you cannot move the activity object.