Shelving units are furniture pieces designed to hold and organize items, typically consisting of horizontal surfaces supported by vertical frames. They come in various sizes, materials, and styles, making them suitable for different spaces, such as homes, offices, and libraries. Common materials include wood, metal, and plastic, and they can be freestanding or wall-mounted. These units are often used to store books, decorative items, or office supplies, helping to maximize space and keep areas tidy. Shelving units can also be customized with additional features like adjustable shelves, drawers, or doors, enhancing their functionality and aesthetic appeal.