Once you reach level 6 you begin to earn ranking points that contribute to your rank. The number of ranking points you have will determine what rank you are. There are 4 ranks: Bronze, Silver, Gold, and Master. In each rank there is 4 sub ranks (I, II, III, IV) these will indicate your progress in said rank. The exception to this is Master rank, which will replace the sub rank with a numbered rank that indicates your place amongst other Master rank players.