Puppies love to chew and bite. It’s their way of exploring the world, trying out food and even being playful for companionship. Nipping puppies are completely normal during play and exploration.
That said, biting isn’t a habit you want your pup to hold on to as they grow into an adult dog. If you don’t get started trying to help them unlearn the behavior when they’re young, it will be a lot more difficult to stop them from biting as they get older.