A laser level is a versatile tool used in construction and home improvement projects to ensure accurate alignment and leveling. It projects a laser beam, either as a line or a dot, onto a surface, providing a precise reference point for tasks such as installing shelves, hanging pictures, or laying tiles. Laser levels can be self-leveling, meaning they automatically adjust to ensure accuracy, or manually leveled, requiring the user to position the tool correctly. They are widely appreciated for their ease of use, efficiency, and the ability to deliver precise results over long distances, making them invaluable for both professional contractors and DIY enthusiasts.