The sole of a shoe is the bottom part that makes contact with the ground. It provides support and traction, helping to prevent slipping while walking or running. Soles can be made from various materials, including rubber, leather, and synthetic compounds, each offering different levels of durability and grip. Soles are typically divided into three sections: the outsole, which is the outer layer; the midsole, which provides cushioning; and the insole, which is the interior layer that offers comfort. Together, these components contribute to the overall performance and comfort of the shoe.