A curtain is a piece of fabric used to cover or decorate windows, doors, or openings. It can serve various purposes, such as providing privacy, blocking light, or enhancing the aesthetic appeal of a room. Curtains come in different styles, colors, and materials, allowing them to fit various interior designs. In addition to their decorative function, curtains can also help with insulation and sound absorption. They are often hung on a rod or track, making them easy to open and close. Some common types of curtains include drapes, sheer curtains, and blackout curtains.