Wallpaper is a decorative material used to cover the interior walls of homes, offices, and other buildings. It is typically made of paper or vinyl and comes in a wide range of designs, patterns, and colors. Wallpaper can be used to add texture, create an accent wall, or provide an overall decorative theme for a room. It is often applied using wallpaper paste or adhesive, and can be easily removed or replaced. In addition to its decorative purposes, wallpaper can also provide insulation and hide imperfections in walls.