Step turn suggests carrying extra speed to the flare in an actual forced landing rather than best glide. VERY IMPORTANT. It enables you to see that invisible wire strung between the trees while you still have height and speed to avoid it...or an inconvenient fence. You can always get rid of that extra energy but if the field is too small and the hedge is approaching all too soon on your rollout after touchdown, it won't hurt nearly as bad as winding your aircraft up in an unseen wire on short final.