Today marks the beginning of Season 8 of the Battle.net ladder of StarCraft II. If you played any games in season 7, you only need to play one game in that bracket in order to place into a division for Season 8.
Season 8 remains largely unchanged. A new map, Condemned Ridge, was added to the 1v1 pool, and two maps, Metalopolis and Korhal Compound LE, were removed. The map changes were made largely in response to their use in tournaments, and the new map was created in response to the types of maps that tend to be popular at tournaments. The original version of the map was set to go live with destructible rocks at the third base, but was removed by players worried about balance issues for Zerg.
Good luck and have fun!