Used metaphorically to mean understanding something perfectly, not about actual nails. When she guessed my favorite movie, she really hit the nail on the head.
Pro Tip 2/3
Positive Connotation
Expresses praise or acknowledgment of someone's precise insight or correct answer. Your analysis was perfect—you hit the nail on the head!
Pro Tip 3/3
Non-literal Compliment
It's a non-literal way of giving someone a compliment for being correct or accurate. He hit the nail on the head when he predicted the outcome of the game.