Each organization has different conferences to divide up the teams into groups. Teams are selected for these conferences depending on the location of the schools. These conferences are put in due to the regional play of the teams and to have a structural schedule for each team to play for the upcoming year. Without these divisions, there would be no way to determine which teams were good or not so it's necessary to have conferences. There are 12 regular season games per team. At the end of this period, the top ranked team in each conference is given the #1 seed and will go on to face off against the #4 seed in the first round of the NCAA Tournament. The second-ranked team will meet the fourth-ranked team and so on. This process is repeated until all four teams have played each other at some point during the season. The winner of the first round game goes on to play the winner of the second round game who plays the winner of the third round game and so on. If there is a tie between two or more teams after three rounds have been played, then a playoff series will be held to break the tie. The format for the playoffs varies by league but almost always includes some type of best-of-three series between all tied teams. The exception is the Pac-12, where the top two seeds receive a one-game advantage in terms of seeding.