Correct positioning before your final explosion in the Olympic lifts is crucial. Mike Burgner gave us the concept of pockets, that the bar must be around mid thigh,before you launch into your final hip drive and shrug. The idea behind “pockets” was an easy to relate to queue. Imagine the bottom of your pockets ( or put your hands in your pockets and press down). That’s where the bar should.
A great group coaching point, but on a refined level it may not work for everyone. ( pocket sizes, arm lengths, thigh lengths vary… they do really!) Some are happy to experiment, others need drills to guide their learning.
Here is a box jump drill that could help.