Definition: Viral marketing describes the technique and natural occurence of web users effectively marketing on behalf of a business by sharing a campaign or any form of online media. Successful viral marketing campaigns are often extremely cost effective and can vault an online business into prominence.
Successful viral marketing focuses on psychology over selling. Knowing why people share information is more valuable than trying to convince them to buy a product. It's also important to have an understanding of how and why users are communicating with each other.
Facebook users share content 47.5 billion times each day, while Twitter users average 208 followers each — that's 208 people who see what they share and can be interested enough to retweet to their followers.
In order to devise a successful viral marketing campaign, an ecommerce company must: