The answer to 'what is deck' is a raised, flat structure typically made of wood or composite materials that is attached to the exterior of a home. A deck provides an outdoor living and entertaining space, often with a view or access to a backyard or garden. Decks can be simple and functional, or more elaborate with features like built-in seating, lighting, and railings.
Decks can be custom-designed to fit the unique layout and style of a home, and they can be built at ground level or elevated on posts or a foundation. They are a popular addition to many homes, as they extend the living space and create an inviting outdoor area for relaxing, grilling, or hosting gatherings.