Use Case Modeling is a technique used in software and systems engineering to identify and clarify the requirements of a system. It involves creating visual representations, known as use case diagrams, that illustrate the interactions between users (or actors) and the system. Each use case describes a specific function or feature, helping stakeholders understand how the system will behave in various scenarios. This modeling approach aids in communication among team members, including developers, designers, and clients. By focusing on user goals and system responses, use case modeling ensures that all functional requirements are captured, leading to a more effective and user-friendly final product.