Interior design is the science of understanding behavior that helps homeowners create a functional space in a building, including the shapes of walls, floors, etc. A professional interior designer must understand interior design and work closely with architects to design an interior space. An interior design professional must have considerable experience in the construction industry. Decorating or decorating interiors, on the other hand, is furnishing a space with beautiful or fashionable things. It is inspired by the style, the colors, the texture of the accessories used and works in its functionality.