Within Zelda mythology, Link is the soul of a legendary hero that throughout history is reincarnated within a seemingly ordinary boy or young man whenever evil arises. To defeat Ganon, Link usually obtains the mystical Master Sword or a similar legendary weapon obtained after completing many trials.
LINK meaning: 1 : to join or connect (two or more things, places, etc.) together; 2 : to connect (someone or something) to a system, network, etc.