The term "1. deild" refers to the top tier of the Icelandic football league system. It is officially known as the Icelandic Premier League and features several teams competing for the championship title each season. The league operates on a promotion and relegation system with the lower divisions, allowing teams to move up or down based on their performance. Founded in 1912, the league has a rich history and has seen various clubs rise to prominence. The season typically runs from spring to autumn, with each team playing a set number of matches. The team with the most points at the end of the season is crowned the champion of 1. deild.