Betri deildin is the top professional football league in Iceland. Established in 1912, it features teams from across the country competing for the championship title. The league operates on a promotion and relegation system with 1. deildin, the second tier of Icelandic football. The season typically runs from May to September, with each team playing a total of 22 matches. The team with the most points at the end of the season is crowned the champion. Betri deildin is known for its passionate fan base and has produced several players who have gone on to represent Iceland at the international level.