Built-in shelves are storage solutions that are integrated into the structure of a room, often designed to fit snugly between walls or around existing features like windows or doors. They can be made from various materials, such as wood or metal, and are often used to display books, decorative items, or other personal belongings. These shelves maximize space and can enhance the overall aesthetic of a room. Unlike freestanding shelves, built-in shelves are permanent fixtures, which can add value to a home. They are commonly found in living rooms, offices, and libraries, providing both functionality and style.