Fawns have spots. To me, that seems like it makes them easier to spot! But to predators like coyotes, spots break up the pattern that their hunting eyes rely on to help identify the fawn as a meal!
Spots serve as a form of camouflage. They protect the deer as it gains strength and confidence in its early months. Most white-tailed deer are born in the spring and early summer. The spots usually fade by winter time.