A way to think and understand what happens when playing a shot with the ball lying, Above or Below the level of your feet.
Playing these shots needs to be practised, to enable them to be clearly visualised, felt and understood with the results that are produced by the line on which the clubhead is being swung on and the effect of the centre of gravity of the ball and the clubhead.
As each and every shot is an individual decision, when the ball is not lying well, there may be other elements that could change these effects, in one way or another. This is for another day.
Enjoy the practice and play happy golf. Tom