The Championship Series is a key stage in various sports leagues, particularly in baseball and basketball. In Major League Baseball, the Championship Series determines which teams will compete in the World Series. It typically features the winners of each league's Division Series, with teams competing in a best-of-seven format. In the National Basketball Association (NBA), the Championship Series is known as the NBA Finals. This series pits the champions of the Eastern and Western Conferences against each other, also played in a best-of-seven format. The team that wins four games first is crowned the league champion.