Floor plans are essential tools in architecture and design, providing a visual representation of a building's layout. They illustrate the arrangement of rooms, spaces, and physical features from a top-down perspective, allowing for better understanding and planning of a space's functionality. These diagrams are crucial for both residential and commercial projects, as they help architects, designers, and clients visualize how a space will be used. By detailing dimensions, furniture placement, and flow between areas, floor plans facilitate effective communication and decision-making throughout the design process.