Viral marketing sounds very avant-garde and you'd be forgiven for thinking that 'going viral' is for the latest teenage crazes, and doesn't apply to your business. But viral marketing existed long before Facebook YouTube and the internet, in fact, you could say pyramid selling is a form of viral marketing.
Viral marketing is any kind of marketing that encourages or induces people to pass on and communicate your marketing message to more people. Viral marketing effectively converts your audience into your own salesforce and team of brand advocates.
To go truly 'viral', each person should pass on your message to two or more people, therefore creating a coefficient of more than one and a reach that increases exponentially.