Ribbons are awards for weapons and support activities. For most weapons, a ribbon is awarded every 10 kills. Support activities such as repairing, reviving, healing, and gunner assists while driving vehicles also earn Ribbons.
Ribbons are worth 250 XP (awarding 1 certification point), but the first 5 ribbons earned each day receive 750 XP (3 certification points) each. There is no limit to the number of ribbons a player may earn.
Ribbons as they are now are only a first pass, and there will be more squad and support ribbons added in the future.