A window treatment refers to any type of decorative or functional covering applied to windows. Window treatments serve various purposes, including enhancing the aesthetics of a room, providing privacy, controlling natural light, and insulating against heat or cold. Common types of window treatments include curtains, drapes, blinds, shades, valances, and shutters. These treatments can be made from various materials such as fabric, wood, metal, or synthetic materials and come in a wide range of styles, colors, and designs to suit different preferences and interior décor.