Viral marketing is the concept of doing something once and having it produce for months or years. You make an electronic publication of some sort, such as an article, video, audio, or PDF file. You then put it into circulation and it gets copied over and over again. Each copy puts what you want (usually links or the URL for it) in front of someone else. The result is that over time, you get more and more of what you’re seeking (page rank, money, credibility, or all of the above!) from a single action taken, which may not even cost you much at all.

Viral marketing has its own terms like anything else, and instead of making you run around the Net finding them, I’ll list them here…

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