Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
At the end of the season the top team was to win promotion to Toppserien, the second team was to play off against the second from bottom team in Toppserien for promotion, while the bottom two teams were to be relegated to the 2. divisjon. In the event, Avaldsnes were champions and were promoted. Medkila came second, but lost the promotion playoff. However, the playoff winner, Kattem, subsequently withdrew their team, and Medkila were then promoted. Alta were offered the vacant place in the 2013 1. divisjon, but declined, opting for relegation. Voss were then offered the vacant place, and accepted it, thus avoiding relegation.
Source: nifs.no Rules for classification: 1) points; 2) goal difference; 3) number of goals scored. (C) Champions; (P) Promoted; (R) Relegated
Promotion play-offs
Medkila faced Kattem, who finished second last in Toppserien, in a two-legged play-off match for the right to play in the 2013 Toppserien. Kattem won the playoff, but subsequently withdrew their team from the league. Medkila were promoted to take their place in Toppserien.
Karlsen, Thomas (6 February 2013). "Medkila til Toppserien". Fotballmagasinet.no (in Norwegian). Archived from the original on 3 March 2013. Retrieved 19 April 2013.
Alta