Who Is Kim Kardashian?

Did I spell her name right?  Honestly what does she do?  I just made a Google+ account and she's my "friend" or whatever that's suppose to mean.  And then I'm looking at Youtube Videos and I keep having to sit through adds of her yelling at someone saying, "Why do you find out your husband's in another country by Twitter?"  (Or something like that)

Honestly who cares?  What does this girl do?  Does she act/sing/...

...Oh, she's sort of hot and rich.  I understand now.