Whats the difference between a snap shot and a  portrait?

the difference is that a portrait you have to get the persons interior what they really are on the inside you have to be close to them. somehow be able to show in a shot the persons personality. also a snap shot is a shot just taken randomly with your buddies just have fun. A portrait when you take a portrait of somebody you want to make them feel comfortable so when you take the picture you can see their personality through the lenses and in the picture you take of them.