Marketing phenomenon that facilitates and encourages people to pass along a marketing message.
Information
Viral marketing depends on a high pass-along rate from person to person. If a large percentage of recipients forward something to a large number of friends, the overall growth snowballs very quickly. If the pass-along numbers get too low, the overall growth quickly fizzles.

At the height of B2C it seemed as if every startup had a viral component to its strategy, or at least claimed to have one. However, relatively few marketing viruses achieve success on a scale similar to Hotmail, widely cited as the first example of viral marketing.
The Six Simple Principles of Viral Marketing
I admit it. The term "viral marketing" is offensive. Call yourself a Viral Marketer and people will take two steps back. I would. "Do they have a vaccine for that yet?" you wonder. A sinister thing, the simple virus is fraught with doom, not quite dead yet not fully alive, it exists in that nether genre somewhere between disaster movies and horror flicks.
But you have to admire the virus. He has a way of living in secrecy until he is so numerous that he wins by sheer weight of numbers. He piggybacks on other hosts and uses their resources to increase his tribe. And in the right environment, he grows exponentially. A virus don't even have to mate -- he just replicates, again and again with geometrically increasing power, doubling with each iteration:
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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 3.
3. email at http://www.hotmail.com" and,
4. Then stand back while people e-mail to their own network of friends and associates,
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.
Elements of a Viral Marketing Strategy
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 3.
3. email at http://www.hotmail.com" and,
4. Then stand back while people e-mail to their own network of friends and associates,
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.
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








