How can I make a sound play for one player only and not everyone? Just put it in a startergui?

I don't know how to use sounds very well yet. I know how to make a sound go when you click a gui. But I don't know if that will make it play for everyone or just that player.

Just position the Sound inside the StarterGui, so that way when the player loads it will load into their PlayerGui. Then, play the sound that is located inside their PlayerGui when you wish and it will only play for that player.