VIRAL MARKETING

The buzzwords viral marketing and viral advertising refer to marketing techniques that use pre-existing social networks to produce increases in brand awareness or to achieve other marketing objectives (such as product sales) through self-replicating viral processes, analogous to the spread of pathological and computer viruses. It can be word-of-mouth delivered or enhanced by the network effects of the Internet Viral promotions may take the form of video clips, interactive Flash games, advergames, ebooks, brandable software, images, or even text messages. The basic form of viral marketing is not infinitely sustainable.
The goal of marketers interested in creating successful viral marketing programs is to identify individuals with high Social Networking Potential (SNP) and create Viral Messages that appeal to this segment of the population and have a high probability of being passed along.
The term "viral marketing" has also been used pejoratively to refer to stealth marketing campaigns—the unscrupulous use of astroturfing on-line combined with undermarket advertising in shopping centers to create the impression of spontaneous word of mouth enthusiasm.
The term Viral Marketing was coined by a Harvard Business School graduate, Tim Draper. The term was later popularized by Tim Draper and Steve Jurvetson of the venture capital firm Draper Fisher Jurvetson in 1997 to describe Hotmail's e-mail practice of appending advertising for itself in outgoing mail from their users.
Among the first to write about viral marketing on the Internet was media critic Douglas Rushkoff in his 1994 book Media Virus. The assumption is that if such an advertisement reaches a "susceptible" user, that user will become "infected" (i.e., accept the idea) and will then go on to share the idea with others "infecting them," in the viral analogy's terms. As long as each infected user shares the idea with more than one susceptible user on average (i.e., the basic reproductive rate is greater than one - the standard in epidemiology for qualifying something as an epidemic), the number of infected users will grow according to a logistic curve, whose initial segment appears exponential. Of course, the marketing campaign may be wildly successful even if the rate at which things are spread isn't of epidemic proportions, if this user-to-user sharing is sustained by other forms of marketing communications, such as public relations or advertising.
Among the first to write about algorithms designed to identify people with high Social Networking Potential is Bob Gerstley in Advertising Research is Changing. Gerstley uses SNP algorithms in quantitative marketing research to help marketers maximize the effectiveness of viral marketing campaigns. In 2004 the concept of Alpha User was released to indicate that it had become now possible to technically isolate the focal point members of any viral campaign, the "hubs" who are most influential. Alpha Users can today be isolated and identified, and even targeted for viral advertising purposes most accurately in mobile phone networks, as mobile phones are so personal.