Viral marketing is, without any doubt, the most effective marketing tool ever. It is social media’s ultimate measure of success and every marketer’s dream. Going “viral” means becoming so over-the-top popular that your content is being retweeted and shared by every Tom, Dick, Harry, Sally and Sue. Why isn’t everybody doing viral marketing then? Creating a successful viral marketing campaign is hard and it takes much trial and error. This infographic details a formula to a successful viral campaign and how to measure it. Good luck!