A nail gun is a power tool used to drive nails into wood or other materials quickly and efficiently. It operates using compressed air, electricity, or a combustion engine, allowing users to complete construction and woodworking tasks faster than using a hammer. Nail guns are commonly used in framing, roofing, and finishing work. There are different types of nail guns, including framing nailers, finish nailers, and brad nailers, each designed for specific applications. Safety features, such as triggers and guards, are essential to prevent accidental firing. Proper training and protective gear are recommended when using a nail gun.