Viral Marketing

Any advertising that propagates itself the way viruses do. e.g. When Hotmail users send e-mails, they infect the recipients with the tagline at the bottom of their messages.Also called V-Marketing, organic marketing, word-of-mouth marketing or word-of-mouse marketing.It can be delivered by word of mouth or enhanced by the network effects of the Internet. Viral marketing may take the form of video clips, interactive Flash games, advergames, ebooks, brandable software, images, or text messages.