Viral marketing (word-of-mouth marketing) is a really cool thing. Just think about it... instead of spending an insane amount of money on newspapers ads, TV commercials or banner ads, you spent nothing - and let your fans do all the work for you. With viral marketing, your campaigns will suddenly get a life of its own - and start to spread like a virus. Everyone want to see it, and when they do, they all want to share it. It is immensely powerful, usually having 500-1000 times greater impact than what you get from regular advertisements.