1. Deild is a term used in Icelandic football, referring to the second tier of the Icelandic football league system. It serves as a competitive platform for clubs aiming to gain promotion to the top division, known as the Úrvalsdeild. The league typically features a number of teams that compete in a round-robin format, where each team plays against every other team. The performance in 1. Deild is crucial for clubs seeking to improve their standings and achieve success in Icelandic football.