The function of a requirements gathering session is to collect and document the specific needs and expectations of stakeholders for a project. During these sessions, project teams engage with clients, end-users, and other stakeholders to identify and analyze functional and non-functional requirements. By ensuring that all voices are heard, these sessions promote clarity and alignment, minimizing ambiguity and scope creep later in the project. Ultimately, effective requirements gathering lays a solid foundation for successful project execution and delivery.