The sand wedge is perhaps the most famous model, but every club has bounce. Bounce is defined as “the measurement, in degrees, of the angle from the front edge of a club’s sole to lowest point on the club (which rests on the ground).” Players have worried about bounce in their wedges for quite awhile, but it’s important in your other clubs as well.
For example, compare the Titleist 680 and 670. The 680 7I has 3° of bounce, while the 670 has 7.5°. Titleist describes the 680 by saying the “narrow sole, moderate camber and bounce angle are designed for players who like to pick the ball off the turf.” Titleist describes the 670 as by saying “the slightly wider sole with more bounce and camber is designed for players with a more aggressive, steeper swing, and is excellent in softer conditions.”
In other words, your swing shape has a lot to do with the proper bounce, and bounce matters in more than a sand wedge.