If you have been playing pickleball for a while I am sure you have heard of the "third shot drop." Playing against an opponent at the 4.0 level and above you will see how this shot permits the serving team to get to the no fault line and equalize the advantage that the receiving side has in getting both player into this position. Here is some discussion of this point by Sara Hansboury. www.sarahansboury.com/third-shot-drop-important-not-option/
Here is a You Tube video showing how to practice the shot. https://www.youtube.com/watch?v=YrOxm3qnnfo
Duane