The design methodology that focuses on iterative improvements and user feedback in software development is known as Agile. Agile emphasizes flexibility, collaboration, and customer satisfaction by breaking projects into manageable increments called sprints. This approach allows teams to adapt to changing requirements and prioritize user needs. Regular feedback loops ensure that the final product meets user expectations, fostering a culture of continuous improvement. Agile methodologies, such as Scrum and Kanban, have gained popularity for their effectiveness in delivering high-quality software in dynamic environments.