Usain Bolt is known as the "Fastest Man in the World" due to his incredible speed and world records in sprinting. His achievements, particularly in the 100 meters and 200 meters, have been groundbreaking. Bolt's charisma and dominance on the track have made him an iconic figure in athletics. His world-record performance of 9.58 seconds in the 100 meters remains one of the most celebrated moments in sports history, solidifying his legacy.