The main goal of the Borg is to perfect themselves by consuming and assimilating technology ("The Borg Collective"). The Borg accomplish this task by conquering other races, assimilating both the species and its technology (The Borg: Documentary Video). However, they only attempt to assimilate those species and technologies which they consider relevant--that is, advanced enough to be of use to their goal for technological perfection ("The Borg Collective").