Pradal Serey is a type of martial art that comes from Cambodia, which is a country in Asia. It's kind of like boxing, but with some different rules.
In Pradal Serey, fighters use their hands, elbows, feet, and knees to hit and kick each other, but they can't grab onto each other like they can in wrestling. They wear gloves and protective gear, like mouth guards, to keep them safe.
During a fight, the fighters try to knock out their opponent by hitting or kicking them a lot. If one fighter gets knocked out, the other fighter will win the match. But if both fighters make it through the whole match, the judges decide who did the best and that person will win.
People like to watch Pradal Serey because it's exciting to see the fighters trying to hurt each other, but also because they are really skilled and it takes a lot of training to become good at it. However, it's important to remember that fighting is only supposed to happen in the ring during a match, and that it's never okay to hurt someone outside of the ring.