The answer to 'what is deck' is a raised outdoor platform or porch, typically made of wood or composite materials, that is attached to a home or building. Decks provide an extended living space outdoors and are commonly used for entertaining, relaxing, and enjoying the surrounding landscape.
Decks can be built at ground level or elevated, and they may include features like stairs, railings, benches, and built-in seating or storage. They are a popular addition to many homes, as they can enhance the overall aesthetic and functionality of the outdoor space.