Unranked is a playlist available in Tom Clancy's Rainbow Six Siege that was introduced in the Operation Ember Rise expansion. The playlist is available for all players with a Clearance Level of 10 or above.
The purpose of the playlist is for players to practice and prepare themselves for the Ranked Playlist. It features all the rules, gameplay changes, and map rotation as the Ranked playlist but does not affect the player's rank or MMR. Additionally, any penalties incurred while in Unranked will also carry over to the Ranked Playlist and vice versa.