It is no longer enough just to look at the absolute number of fans a brand has on Facebook. Anyone can purchase Facebook fans -- what matters is the amount of engagement around the brand.

Elle Zober stuck a sign in the ground that said: "Husband left us for a 22-year-old... House For Sale by scorned, slightly bitter, newly single owner." It went viral! Marketers pay an arm and a leg for that kind of publicity. Yet why can't they get the traction Elle did?

Commercials are excellent means of advertising. But they only reach audiences watching TV at that one moment that they are playing. Unless, they were good enough to go viral. So what makes a commercial good enough to be shared online and spread like wildfire?

"Today, I had an amazing experience at...." Discovering a tweet like the above referencing a review about you, your organization, or your brand is certainly better than: "I'll never visit / do business with / interact with / buy from...."

Angry Birds has transfixed the world with its angry -- but cute -- birds launching pigs. Its new game is based in space. But Angry Birds' creative director aims even higher: he wants to get the whole world exercising, with Angry Birds of course.

Viral marketing will send consumers to a brand's website for a first visit, but what will motivate them to come back? These four important elements.

An Australian bank's fees are so low that competitors have duct-taped some of its employees to lamps hovering yards above ground. Or so those respo...