Use case analysis is a technique used in software development to identify and clarify the requirements of a system. It involves defining specific scenarios in which users interact with the system, known as use cases. Each use case outlines the steps taken by the user and the system's responses, helping to visualize how the system will function in real-world situations. This analysis helps stakeholders, including developers, project managers, and clients, understand the system's capabilities and limitations. By focusing on user interactions, use case analysis ensures that the final product meets user needs and expectations, ultimately leading to a more effective and user-friendly system.