Drop Shot is one of my personal favorite mods (I seem to say that a lot) that we have on our controllers. I have used it in Call Of Duty Black Ops III, Advanced Warfare, Infinite Warfare and even the most recent, Call Of Duty WWII and I find I do so much better with it.
You know when you are playing Call Of Duty and you think you have an enemy, but then out of nowhere, they are on the floor, shooting at you? Well, that is what Drop Shot does. It takes away the need for you to have to press in the analog stick twice in order to lay on the floor. The moment you pull the trigger to shoot, you will be on the floor.
It makes you a much better player and I will say that it is a lot of fun to use. It is also great if you want to learn how to Drop Shot on your own as it will help you realize what are the best situations to utilize it.
Drop Shot is just one of many mods that we have on our controllers, but I would say that it is one of the best if you find yourself (no matter the version of Call Of Duty you are playing) one on one with the enemy quite often.