Technically the "lowest" score on a given hole. 3 under par for a hole.
Winning in golf usually means shooting the lowest score in relation to par. There are other competition formats however, where the player who shoots the lowest score may not win, such as match play. Match play is a hole by hole competition.
The players tee off the first hole in order of lowest to highest handicap. From the second hole, the player with the lowest score on the previous hole has the honour and it continues like so.
That would be Golf. Basicly the player with the least amount of strokes to get the ball in the hole wins.
On an 18 hole course the best score is 18.
On the first hole of a round of golf, the player with the lowest handicap goes first, then in order of lowest to highest. Unless you are playing in a competition where a draw has been made and the players have been told which order they tee off in. On subsequent holes, the player who had the lowest score on the previous hole tees off first, unless there are two or three players tied on the same score from the previous hole, in which case the hole before that is used to break the tie.
Par for the hole.
A single swing that lands the ball into a golf hole. Therefore hole in one.