It's important to remember that she's not biting to be bad or to cause trouble. Biting is a normal activity for a puppy still learning from her mom and littermates. If she bites or plays too hard with another puppy, that puppy will yelp and stop the fun. If she's too rough with an older dog, that dog will put her in her place. As the leader of her pack, it's your job to outline behaviors that are fun, and behaviors that are no fun at all.
If she never learns that biting is unacceptable as a puppy, this could cause bigger problems when she grows up. She could become aggressive towards other dogs or even people. As the leader of her pack, it's your job to let her know that biting never results in a reward and good manners get her further toward her goal. With firm training and patience, you'll curb that biting habit in no time.