Allsvenskan is the top professional football league in Sweden, established in 1924. It features 16 teams that compete annually for the championship title. The league operates on a promotion and relegation system with Superettan, the second tier of Swedish football. The season typically runs from April to November, with each team playing 30 matches. The team with the most points at the end of the season is crowned the champion. Allsvenskan is known for its passionate fan base and has produced many talented players who have gone on to play internationally.