Mise-en-scene refers to everything presented to the viewer in a film or theatrical scene, including color, costume, props, set/location, performance/blocking, and lighting. It establishes time, place, and mood. Key aspects of mise-en-scene include costumes that convey symbolism or social class, sets/locations that provide context, blocking/performance that positions actors, and lighting that creates atmosphere through brightness or darkness. Careful use of these elements allows filmmakers to communicate meaning through visuals alone.