"Buzz
or word-of-mouth marketing influences more people to buy, or not to
buy products and services, than most other forms of marketing. Why
is it so powerful? Basically, we have a need to share information as
a means of communication and also as a way of understanding the
world around us. Often, we base many of our purchasing decisions on
information gleaned from friends and well-respected associates. We
tend to listen to them more readily then most mass-media messages."
-- about.com
Here's
a list with more information about Buzz Marketing. Check it out.