A staircase is a set of steps that allows people to move between different levels of a building. It usually consists of a series of flat surfaces called treads, which you step on, and vertical parts called risers, which connect the treads. Staircases can be found in homes, schools, and public places, making it easy to access upper floors or basements. Staircases can come in various designs, such as straight, spiral, or curved. Some may have handrails for safety, helping people hold on while climbing. They can be made from materials like wood, metal, or concrete, and often add style to a space, enhancing the overall look of a room or building.