This is where they learn to inhibit their biting. This is where they learn to control themselves. If they are too rough or rambunctious, they will find out because of how the other dogs and puppies react and interact with them. This is something that happens naturally and it is something we cannot accomplish. It can only be learned from trial and error. There is nothing you can say or do to educate them in this realm. They must learn from their own experience.
Another major advantage of dog to dog socialization besides the fact that it will help your dog to grow up not being fearful of other dogs is that they can vent their energy in an acceptable manner. Puppies that have other puppies to play with do not need to treat you like littermates. So the amount of play biting on you and your family should dramatically decrease. Puppies that do not play with other puppies are generally much more hyperactive and destructive in the home as well.