Steel piles are long, slender columns made of steel that are driven deep into the ground to support structures like buildings and bridges. They are designed to transfer the load of the structure to deeper, more stable soil or rock layers, ensuring stability and safety. These piles are often used in construction projects where the surface soil is weak or unstable. By using steel piles, engineers can create a solid foundation, allowing for the construction of taller and heavier structures without the risk of settling or shifting over time.