Tangling with giant beasts in Monster Hunter online serves a number of purposes. First, and probably most importantly, it can be a lot of fun. Second, it gets you nice items you can use later on to build new weapons and armor. Third, it's a lot easier to kill a boss with four players running around instead as opposed to offline play where it's just you and an AI companion named Cha-Cha. And fourth, it can be a cool social experience, giving you a sense of satisfaction gained through proper teamwork, planning, and execution.