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 put onto walls using wallpaper paste. Wallpaper can be made from a variety of materials such as paper, vinyl, fabric, and even natural materials like grasscloth and cork. Wallpaper is available in a wide range of colors, patterns, and textures, making it a great way to add style and personality to any room.