Division II can be looked at as a more fun based Division than Division I. Unlike Division I, requirements for joining in Division II tend to be more relaxed. Therefore, it would be rather easy for a newer member to join a Division II clan and be immediately immersed in the Clan League. Once a newer member has shown adequate strength in Division II, he may find it easier to join a Division I clan. While Division II does not bring the glory of being the "best of the best" as Division I does, it is thought to be a more balanced Division where each clan has an equal chance of being victorious at the end of the Clan League season.
If you're looking for relaxed, fun, competitive battling, Division II is the place for you.