Soviet montage theory is an approach to understanding and creating cinema that relies heavily upon editing. It is the principal contribution of Soviet film theorists to global cinema, and brought formalism to bear on filmmaking.

Film editing is both a creative and a technical part of the post-production process of filmmaking. The term is derived from the traditional process of working with film which increasingly involves the use of digital technology. When putting together some sort of video composition, typically, you would need a collection of shots and footages that vary from one another. The act of adjusting the shots you have already taken, and turning them into something new is known as film editing.