Use case modeling is a technique used in software development to capture and describe the functional requirements of a system from the user's perspective. It focuses on identifying the various actors (users or external systems) that interact with the system and the specific goals or tasks they aim to accomplish, known as use cases. This approach helps visualize how the system should behave in different scenarios, ensuring alignment with user needs and expectations. Use case models typically include diagrams and descriptions that outline the interactions, providing a clear and structured framework for system design, development, and testing.