The World Series Championship is the annual championship series of Major League Baseball (MLB) in the United States. It typically takes place in October and features the champions of the American League and the National League competing in a best-of-seven playoff format. The team that wins four games first is crowned the champion. The World Series has a rich history, dating back to 1903, and is one of the most prestigious events in professional sports. Winning the World Series is considered the pinnacle of success in baseball, and the champions receive the Commissioner's Trophy as a symbol of their achievement.