A walker is a mobility aid designed to assist individuals who have difficulty walking or maintaining balance. It typically consists of a frame with four legs, providing stability and support. Walkers can be used by people recovering from surgery, those with chronic conditions, or the elderly who may need extra help while moving around. There are different types of walkers, including standard walkers, which require users to lift them with each step, and wheeled walkers, which allow for easier movement. Some walkers come with additional features, such as seats or storage compartments, to enhance convenience for users.