The general interpretation of a use case covers the description of what a system does in a real-world scenario to achieve a set of objectives. Here the system refers to a technology platform, component or tool. Scenario refers to a real-world problem, and the objectives define a solution to the problem.
In everyday language, people say “Here’s a use case for this new tool,” to describe a practical problem scenario that the tool can solve to arrive at a set of objectives that represent the solution.
In a more classical sense of UML (Unified Modelling Language), a use case represents a detailed requirements depicting how a systems should behave in various real-world situations,and is an important component of any system’s design artifacts.