What is all the fuss about Super Bowl?

I really don't understand what all the fuss is about that even Australian television broadcast on the Superbowl game. Excuse me for my ignorant about this "super" sport but I live down under and it is an obvious enough reason that I don't know and don't care much about it. The game on Sunday, Feb 7th apparently have 106.5 millions viewers tuned in in the US. Wow!!!!!! When is the Australian