The bottom line is that the message must be perceived as having value.

Relevant or timely information, research, or studies are all examples of content that may be viewed as potential pass-along material. Interactive content like a quiz or test can inspire forwarding, especially if it's fun. Personality tests, fitness quizzes, or compatibility questionnaires are all things that have been passed to my inbox at one time or another. Why? Because they're entertaining. And entertainment has value!

A cool, multimedia experience is always going to achieve some pass-along. Rich media email is getting a lot of press lately. Vendors like RadicalMail and AdTools have Forward to a Friend capabilities built right into their technology, facilitating pass-along. And for them, right now, this works. Eventually, as rich media becomes more of the norm, marketers will still have to rely on the value proposition in their message being enough to distinguish their message from the rest to make their particular email campaign worthy of being sent to a friend.

Should you try to capitalize on viral marketing? Absolutely. You have to incorporate into your email campaigns some value that would inspire forwarding. Without a doubt, you should reap the benefits of reaching more than your target audience, stretching those advertising dollars. But understand that viral marketing is a tactic, a strategy, and an integral element of your offer. One that works toward achieving your campaign objectives. Incorporate this knowledge into your email campaigns.

One more thing: You can craft a brilliant offer and a great message, and follow all the rules of Email Marketing 101, but if a consumer visits your site and has an experience less than what was promised, youre going to achieve viral marketing as well the bad kind.

What does a virus have to do with marketing? Viral marketing describes any strategy that encourages individuals to pass on a marketing message to others, creating the potential for exponential growth in the message's exposure and influence. Like viruses, such strategies take advantage of rapid multiplication to explode the message to thousands, to millions.

Off the Internet, viral marketing has been referred to as word-of-mouth, creating a buzz, leveraging the media, network marketing. But on the Internet, for better or worse, it's called viral marketing. While others smarter than I have attempted to rename it, to somehow domesticate and tame it, I won't try. The term viral marketing has stuck.

The Classic Hotmail.com Example

The classic example of viral marketing is Hotmail.com, one of the first free Web-based e-mail services. The strategy is simple:

1. Give away free e-mail addresses and services,
2. Attach a simple tag at the bottom of every free message sent out: "Get your private, free email at http://www.hotmail.com" and,
3. Then stand back while people e-mail to their own network of friends and associates,
4. Who see the message,
5. Sign up for their own free e-mail service, and then
6. Propel the message still wider to their own ever-increasing circles of friends and associates.

Like tiny waves spreading ever farther from a single pebble dropped into a pond, a carefully designed viral marketing strategy ripples outward extremely rapidly.

Elements of a Viral Marketing Strategy

Accept this fact. Some viral marketing strategies work better than others, and few work as well as the simple Hotmail.com strategy. But below are the six basic elements you hope to include in your strategy. A viral marketing strategy need not contain ALL these elements, but the more elements it embraces, the more powerful the results are likely to be. An effective viral marketing strategy:

1. Gives away products or services
2. Provides for effortless transfer to others
3. Scales easily from small to very large
4. Exploits common motivations and behaviors
5. Utilizes existing communication networks
6. Takes advantage of others' resources

Let's examine at each of these elements briefly.

1. Gives away valuable products or services

"Free" is the most powerful word in a marketer's vocabulary. Most viral marketing programs give away valuable products or services to attract attention. Free e-mail services, free information, free "cool" buttons, free software programs that perform powerful functions but not as much as you get in the "pro" version. Wilson's Second Law of Web Marketing is "The Law of Giving and Selling" (http://www.wilsonweb.com/wmta/basic-principles.htm). "Cheap" or "inexpensive" may generate a wave of interest, but "free" will usually do it much faster. Viral marketers practice delayed gratification. They may not profit today, or tomorrow, but if they can generate a groundswell of interest from something free, they know they will profit "soon and for the rest of their lives" (with apologies to "Casablanca"). Patience, my friends. Free attracts eyeballs. Eyeballs then see other desirable things that you are selling, and, presto! you earn money. Eyeballs bring valuable e-mail addresses, advertising revenue, and e-commerce sales opportunities. Give away something, sell something.

2. Provides for effortless transfer to others

Public health nurses offer sage advice at flu season: stay away from people who cough, wash your hands often, and don't touch your eyes, nose, or mouth. Viruses only spread when they're easy to transmit. The medium that carries your marketing message must be easy to transfer and replicate: e-mail, website, graphic, software download. Viral marketing works famously on the Internet because instant communication has become so easy and inexpensive. Digital format make copying simple. From a marketing standpoint, you must simplify your marketing message so it can be transmitted easily and without degradation. Short is better. The classic is: "Get your private, free email at http://www.hotmail.com." The message is compelling, compressed, and copied at the bottom of every free e-mail message.

3. Scales easily from small to very large

To spread like wildfire the transmission method must be rapidly scalable from small to very large. The weakness of the Hotmail model is that a free e-mail service requires its own mailservers to transmit the message. If the strategy is wildly successful, mailservers must be added very quickly or the rapid growth will bog down and die. If the virus multiplies only to kill the host before spreading, nothing is accomplished. So long as you have planned ahead of time how you can add mailservers rapidly you're okay. You must build in scalability to your viral model.

4. Exploits common motivations and behaviors

Clever viral marketing plans take advantage of common human motivations. What proliferated "Netscape Now" buttons in the early days of the Web? The desire to be cool. Greed drives people. So does the hunger to be popular, loved, and understood. The resulting urge to communicate produces millions of websites and billions of e-mail messages. Design a marketing strategy that builds on common motivations and behaviors for its transmission, and you have a winner.

5. Utilizes existing communication networks

Most people are social. Nerdy, basement-dwelling computer science grad students are the exception. Social scientists tell us that each person has a network of 8 to 12 people in their close network of friends, family, and associates. A person's broader network may consist of scores, hundreds, or thousands of people, depending upon her position in society. A waitress, for example, may communicate regularly with hundreds of customers in a given week. Network marketers have long understood the power of these human networks, both the strong, close networks as well as the weaker networked relationships. People on the Internet develop networks of relationships, too. They collect e-mail addresses and favorite website URLs. Affiliate programs exploit such networks, as do permission e-mail lists. Learn to place your message into existing communications between people, and you rapidly multiply its dispersion.

6. Takes advantage of others' resources

The most creative viral marketing plans use others' resources to get the word out. Affiliate programs, for example, place text or graphic links on others' websites. Authors who give away free articles, seek to position their articles on others' webpages. A news release can be picked up by hundreds of periodicals and form the basis of articles seen by hundreds of thousands of readers. Now someone else's newsprint or webpage is relaying your marketing message. Someone else's resources are depleted rather than your own.

History

The term Viral Marketing was coined by a Harvard Business School professor, Jeffrey F. Rayport, in a December 1996 article for Fast Company The Virus of Marketing. The term was further 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., sign up for an account) and can then go on to infect other susceptible users. As long as each infected user sends mail to more than one susceptible user on average (i.e., the basic reproductive rate is greater than one), standard in epidemiology imply that the number of infected users will grow according to a logistic curve, whose initial segment appears exponential.

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.

Notable examples of viral marketing

* BusinessWeek (2001) described web-based campaigns for Hotmail (1996) and The Blair Witch Project (1999) as striking examples of viral marketing, but warned of some dangers for imitation marketers.

* Burger King's The Subservient Chicken campaign was cited in Wired as a striking example of viral or word-of-mouth marketing.

* In 2000, Slate described TiVo's unpublicized gambit of giving free TiVo's to web-savvy enthusiasts to create "viral" word of mouth, pointing out that a viral campaign differs from a publicity stunt.

* Cadbury's Dairy Milk 2007 Gorilla advert was heavily popularised on YouTube and Facebook.

* With the emergence of Web 2.0, mostly all web startups like facebook.com, youtube.com, collabotrade.com, myspace.com, and digg.com have made good use of Viral Marketing by merging it with the social networking.

* The release of the 2007 concept album Year Zero by Nine Inch Nails involved a viral marketing campaign, including the band leaving USB drives at concerts during NIN's 2007 European Tour. This was followed up with a series of interlinked websites revealing clues and information about the dystopian future in which the album is set.

* The film Cloverfield initially released one teaser trailer that did not reveal the title—only the release date. The subsequent online viral marketing campaign for the film is remarkably complex, making use of everything from fictitious company websites to MySpace profiles for the film's main characters.

* In 2007, World Wrestling Entertainment promoted the return of Chris Jericho with a viral marketing campaign using 15-second cryptic binary code videos. The videos contained hidden messages and biblical links related to Jericho, although speculation existed throughout WWE fans over who the campaign targeted. The text "Save Us" and "2nd Coming" were most prominent in the videos. The campaign spread throughout the internet with numerous websites, though no longer operational, featuring hidden messages and biblical links to further hint at Jericho's return.

* In 2007, portuguese football club Sporting integrated a viral feature in their campaign for season seats. In their website, a video required the user to input his name and phone number before playback started, which then featured the coach Paulo Bento and the players waiting at the locker room while he makes a phone call to the user telling him that they just can't start the season until the user buys his season ticket. Flawless video and phone call synchronization and the fact that it was a totally new experience for the user led to nearly 200,000 pageviews phone calls in less than 24 hours.