A staircase is a structure designed to connect different levels of a building or space. It typically consists of a series of steps, which are flat surfaces that allow people to walk up or down. Staircases can be made from various materials, including wood, metal, and concrete, and they often include handrails for safety. Staircases come in various designs, such as straight, spiral, or L-shaped. They are essential in homes, offices, and public buildings, providing access to upper floors or basements. The design and construction of a staircase must adhere to safety standards to ensure stability and ease of use.