Candelas per square meter (cd/m²) is a unit of measurement that describes the brightness of a surface as perceived by the human eye. It quantifies how much light is emitted or reflected from a specific area, making it useful for evaluating displays, such as televisions and computer monitors. Higher values indicate a brighter surface, which can enhance visibility and clarity. This measurement is particularly important in fields like photography, cinematography, and interior design, where lighting plays a crucial role. Understanding candelas per square meter helps professionals create optimal lighting conditions for various environments and applications.