Participatory design is a design approach in which users are actively involved in the design process. This can involve collaboration between designers and users to co-create design solutions, or it can involve users acting as designers themselves, using their own expertise and experiences to shape the design of a product or service. Participatory design is based on the idea that users have valuable knowledge and insights that can inform the design process, and that involving them in the design process can lead to better and more usable solutions. Participatory design is often used in fields such as healthcare, education, and public policy, where the needs and perspectives of users are critical for the success of a design. It can also be useful for addressing complex or contentious design challenges, as it allows for a more inclusive and democratic approach to design.