Shots vs Setups

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

    A shot is an uninterrupted group of frames for any period of time. Each cut moves from one shot to another one. A setup is the placement and angles of the lights and camera on set and each setup takes time to adjust everything. The main difference between a shot and a setup is that a setup can remain the same over multiple shots, maybe with minimal changes. The most important thing to keep in mind when shooting a scene is to shoot the shots by order of setup rather than the by order of shots. This is because there can be multiple shots that have the same setup but aren't in order. Thus, to save time, you should shoot all of those shots consecutively even though they aren't chronological as that means you'll have to move your setup less. Additionally, you should shoot similar shot with similar setups after one another as the small changes in setup will be much quicker than going back and forth—which is called a turnaround.