Players to the three seats to the left of the dealer are said to be in "early position." This is considered the worst position in poker, since you have to act first without knowing how any of the other players are going to play their hands.
Because you have to decide whether to fold or raise (or whatever) without a lot of information on the other players, it's a good idea to only play the best of the best of cards here.
Sometimes abbreviated "EP"


