In competition, lifters compete in weight classes and are given three attempts at both the snatch and the clean and jerk. The best of each lift is added to give a total. The lifter with the highest total wins the competition.
Though the competition sounds relatively simple, getting good is not! To be successful at weightlifting, an athlete has to be strong, fast, stable, and flexible...not to mention technically proficient. See the video below of world record holder lu xiaojun putting almost 400 pounds over his head!