Elevation changes add character to golf holes. On an uphill lie the ball will fly higher and shorter as the uphill slope will launch the ball much higher.. The ball may also hook, so take more club and play for the hook. On a downhill the ball will fly lower and go longer, the down slope will take loft off the club. Depending on the severity of the slope you may not be able to hit a long iron or fairway metal wood. Gravity is throwing your weight to your lead leg. The ball may also fade, so take less club and play for the fade. Your set up principle is to have your shoulders match the angle of the slope.