Requirements Engineering is the process of defining, documenting, and managing the needs and expectations of stakeholders for a project. It helps ensure that the final product meets the desired goals by gathering input from users, clients, and other interested parties. This phase is crucial in software development, as it lays the foundation for what the system should achieve. During Requirements Engineering, various techniques such as interviews, surveys, and workshops are used to collect information. The gathered requirements are then analyzed, prioritized, and organized into clear specifications. This structured approach minimizes misunderstandings and helps teams deliver a product that aligns with user needs.