What do we mean by Viral Marketing?
Viral marketing includes those actions that are intended to be transmitted from the recipient to your circle of influence by the same message recipient. This is about getting the message being transmitted from one person to your contacts like a virus, hence the name of viral marketing.
The goal is to create advertising pieces to reach a trigger, interest and involvement level in the recipient so that the person looks pushed forward to resend it to the acquaintances, because of the need to share that message because of their involvement, fun, surprise, etc.