Wallpaper is a decorative material used to cover and decorate the interior walls of homes, offices, and other buildings. It is usually sold in rolls and is applied onto a wall using wallpaper paste. Wallpaper can be made from many materials such as paper, vinyl, fabric, and even natural materials like grasscloth and cork. It is available in a wide variety of colors, patterns, and textures, making it a great way to add style and personality to any room. Wallpaper is also easy to clean and maintain, making it a popular choice for many homeowners.