To become a good or even adequate bunker player, it is critical to understand the design of the sand wedge. A sand wedge is created with what we call bounce to the flange of the club. When the club shaft is straight up and down you will notice that the leading edge of the club sits off the ground. This allows the club as it swings downward to skim sand without digging.
Now we do have situations, for instance, fluffier sand where you might actually want to open the sand wedge a little more to actually increase the bounce. Again, that reduces the digging effect of the golf club. As you get into a fried egg you actually want to decrease bounce to make sure the club digs underneath the ball, so you can get it out of the bunker. When you get to a buried lie you actually want to lean the shaft so that the leading edge will dig even further into the sand, again getting the ball out of the sand.