Just like the visuals, the story and the characters, editing is part and parcel to a good piece of work. Good editing can make your film more exciting and more dramatic.
It can also, in some cases, make up for a lack of strong visuals. It is one of the final stages of the great balancing act required to make a great film.
When making a short or feature length film with little cash, good editing is valuable. This is the stage where the film moves from being a collection of shots to a single piece.
A good editor must have a sense of pacing, to know when to cut from one shot to another. Just like an angle or a particular frame conveys an idea, so can a single cut. Part of a film’s subtext can be told through editing choices.