Wallpaper refers to a material, usually made of paper or vinyl, that is applied to walls to decorate and enhance the appearance of interior spaces. It typically comes in rolls and features various designs, patterns, colors, and textures. It is paper that is pasted in vertical strips over the walls of a room to provide a decorative or textured surface. Wallpaper is commonly used as an alternative to painting walls and offers versatility in transforming the aesthetic of a room. It can range from traditional patterns to modern designs, catering to different preferences and styles.