The performance of skis and snowboards can be greatly affected by bevelling the base and side edges.
Increasing the base edge bevel lifts more of the bottom edge off the snow making the ski or snowboard more forgiving, so it won't catch unexpectedly.
This also results in better glide and greater speed.
Base edge bevel at the tips and tails also makes the ski or snowboard easier to turn.
Increasing the side edge bevel helps increase the gripping power of a ski or snowboard, particularly when on hard snow or ice.
The trick is finding the right the base and side edge bevel to match your needs.