A pile driver is a piece of heavy machinery used in construction to drive piles into the ground. Piles are long, sturdy columns made of materials like wood, steel, or concrete, and they provide support for buildings and other structures. The pile driver uses a heavy weight that is lifted and then dropped onto the pile, forcing it deep into the soil. There are different types of pile drivers, including vibratory and impact drivers. Vibratory pile drivers use vibrations to help the pile sink, while impact drivers rely on the force of the weight. Both methods are essential for ensuring that structures are stable and secure.