Arch support refers to the structure within footwear that helps maintain the natural shape of the foot's arch. It provides stability and distributes body weight evenly, which can reduce strain on the feet, ankles, and legs. Proper arch support is essential for comfort, especially for individuals with flat feet or high arches. Many types of shoes, including athletic and casual footwear, incorporate arch support to enhance performance and prevent injuries. Orthotic insoles can also be used to provide additional support tailored to an individual's foot shape, helping to alleviate pain and improve overall foot health.