Division ranking is mostly for show (i.e. division 1 assault, engineer, support, or recon) however when you join a server your skill division will be used to assign you to a team. For example if you join into a server it will say you have been assigned to Russian/Chinese/US team based on your skill this will ensure your not stuck on a team with only rank 1 players going up against rank 140 veterans instead each teem will have a fair mix of all the skill levels. So even if your just a beginner you can still end up in a lobby with some of the most skilled players online. To check your division go to leaderboards on battlelog.
