Final answer:
A self-contained series of screens that helps a user complete specific activities is known as an application workflow or user interface flow, guiding the user through tasks in the app.
Step-by-step explanation:
A self-contained series of screens that enable a user to complete specific activities is called an application workflow or a user interface flow. These terms refer to the progression through an application or system that facilitates the user's goal or task completion. For example, when you use a ride-sharing app, the application workflow involves selecting your pickup location, choosing your destination, confirming your ride option, and finally, viewing the ride as it approaches on a map.