The Campeonato Brasileiro, often referred to as the Brasileirão, is the top professional football league in Brazil. Established in 1971, it features 20 teams competing annually for the championship title. The league operates on a system of promotion and relegation with the Campeonato Brasileiro Série B. Matches are typically held from May to December, with each team playing 38 games. The team with the most points at the end of the season is crowned the champion. The league is known for its passionate fan base and has produced many famous players, contributing significantly to the global football scene.