Viral marketing, unlike word-of-mouth marketing, has a compounding effect. A consumer tells five to ten people, and then those five to ten people tell another five to ten people. The driving force behind most viral campaigns is the passion a consumer carries. It's like a virus that continuously infects more people and spreads without requiring any more marketing effort.

Crowdfunding, the process of pooling dollars from a large population of people to fund a larger project, has significantly increased in volume over the past several years. According to Statista, $34.4 billion was raised in the United States through crowdfunding in 2015. In 2012, this number was $2.7 billion. That number continues to trend upward as new crowdfunding options become available.
The reason to make use or virality, the ease in spreading and sharing, is however a double-edged sword. We cannot forget that in this type of campaign, a large part of the control falls into the hands of the users, and we risk the message being misinterpreted or parodied. On the other hand, a successful viral campaign can work miracles for your brand’s results.