Standing on a perpendicular line from the target is a "square" or "even" stance. This stance is neutral giving the least amount of front to back stability.
Moving the back foot forward of this perpendicular line opens your stance and is an "open" stance. This aids front to back stability and allows more string clearance. But, it may cause you to use your arm muscles instead of your back muscles to draw.
Withdrawing the back foot from this perpendicular line closes your stance and is a "closed" stance. This also aids in front to back stability and it increases your use of back muscles to draw. But, it reduces string clearance.
If you are speaking in terms of a stance for archery hunting in a dynamic situation where your shot presentation can quickly change while hunting game afoot; I find it best to maintain a well balanced stance that allows the flexibility to move. A boxer's stance most often comes to mind. This can be used to move in a fluid motion from open, even, closed, standing upright reversed cant, upright, full cant, kneeling, sitting, and everything between.
I do not like a rigid style static shooting stance for hunting afoot.
Daddy Bear