From Press Release:
In two short days, Season 02 arrives for Call of Duty: Modern Warfare II and Warzone 2.0.
Set to kick off with Season 02 is Ranked Play, an authentic online competition experience for players that offers more rewards to the most skilled and dedicated players. The Rank system has received an overhaul that puts more weight and reward on winning matches, as well as additional features such as Skill Rating Forgiveness and Demotion Protection, and more!
Check out the Call of Duty blog for all the intel on Ranked Play, launching with Season 02: https://www.callofduty.com/