Wallpaper is a decorative material used to cover the interior walls of homes, offices, and other buildings; it is one aspect of interior decoration. It is typically sold in rolls and is applied onto a wall using wallpaper paste.

• Composition: Wallpapers can be made from various materials, including paper, vinyl, textiles, and non-woven materials.
• Function: Beyond aesthetics, wallpaper can also be used to cover imperfections in a wall's surface, add warmth, or create a specific ambiance in a room.
• Application: Applying wallpaper can range from a DIY project to professional installation, depending on the type of wallpaper and the desired outcome.

For more information, you can refer to these resources:

• Wikipedia: Wallpaper
• Britannica: Wallpaper