User blog comment:Crazy sam10/Call of Duty: Ghosts will have dedicated servers on Xbox One, Blitz mode reveal and more/@comment-24.2.70.213-20130820181547/@comment-72.130.173.244-20130820184500

Currently, COD is working off a P2P connection or Player to Player connection. One player is host and the latency, or lag, is entirely dependent on that player. Dedicated servers removes that problem entirely by hosting the game on a server, which has a much more consistent connection than a P2P one.