shot v.s. setup

What is the main difference between a shot vs. a set up? What is the most important thing to keep in mind when you're going to shoot a scene?

A setup is a configuration of the lighting, props, set dressing, and actors all combined to create a desired shot. On the other hand, a shot is the entire aesthetic of the scene, including angles, movement, and other aspects of camera techniques used express emotion and ideas. It is important to keep in mind that some shots are able to be taken in the same lighting set up, even if the camera angle or the point of focus is different. This can allow time efficiency on set, thus eliminating unnecessary set movements in a turnaround. This may make the shots out of order. However, by avoiding complete turnarounds, time used to change the lighting is drastically cut short.