You can review all division definitions here.

GREEN DIVISION = RATED 4, 5, 6, 7

• The GREEN division is a hybrid recreational and competitive division and general volleyball knowledge is required to be a good fit.
• Players are learning and applying CGVA and general volleyball rules.
• Players in this division typically don't have any formal training but are fairly athletic and are able to move quickly to the ball and react to plays as they unfold.
• At this level players are familiar and aiming for three team contacts (bump, set, spike) on every possession.
• A typical player can execute some skills (hitting, blocking, setting, passing, digging, and serving), but the results may be error-prone.
• Players in the GREEN division may not have a NAGVA rating.