The transom transfers the energy generated by your motor to the rest of the hull, moving your boat through the water. By turning the helm, you change the angle that the motor is pushing from, and that redistribution of energy against the transom turns your boat.
The letter m under the shoe width represents.... The letter M under the shoe width represents the Medium Width size. You may also find the letter N, which stands for Narrow. The letter W for Wide, the letters WW for extra wide and the WWW for double extra wide sizes.
Generally, wide width shoes are for people with wide feet where the shoe is wider in all areas from from the heel to the toe. But shoes with wide toe box are ideally suited for runners that need extra space in the toe area while having a snug fit in the heel and mid foot.