Mise-en-scene refers to everything visible within the frame of a shot, including color, costume, props, location, blocking/performance, and lighting. These elements are used to convey meaning and provide context about characters and their circumstances. For example, costumes can indicate a character's social class, lighting can set mood, and color can symbolize ideas like danger or purity. Together, mise-en-scene aims to immerse viewers in the world of the film through visual authenticity.