Over the last few years, the use of online social networks has increased exponentially, and some of these "virtual communities" are among the most visited sites on internet. With this boom in popularity has also come a need for marketing within these spaces, and very few academic literature exists on how to best utilize this new and budding arena for advertising ventures. This book, therefore provides a newmetric of success for social network marketing, supplemental to the more traditional cost analysis that most marketing developers currently use. This book explain the prevalence of hernia.