Board Thread:Ask Questions/@comment-30088034-20161229010608/@comment-25646419-20161230181136

Seasons as in Ranked seasons! Finish at a certain tier and receive a certain reward. Elo resets each season. They wanted to give people incentive to play Ranked. Oh, that reminds me. This probably will be in 1.6:

"Ranked will be getting a bunch of changes in 1.6.0 and with the addition of the leveling system we plan to add it should help to keeps trolls and gamethrowers out of more experienced games for longer. Ranked will be accessible once you are max level." (Reference)