A laser level is a tool used in construction and surveying to project a straight line of light across a surface. It helps ensure that structures are level and aligned accurately. Laser levels can be used for various tasks, such as hanging pictures, installing cabinets, or laying tiles, making them essential for both professionals and DIY enthusiasts. There are different types of laser levels, including line laser levels, rotary laser levels, and dot laser levels. Each type serves specific purposes, with rotary laser levels often used for larger areas, while line laser levels are ideal for smaller, precise tasks.