Remember the HillTop ad that Coca-Cola did? If not, perhaps the lyrics will spark a memory - "I'd Like to Buy the World a Coke." Is the song stuck in your head? This jingle had the whole world singing, and if that weren't enough, it was recently revisited on the Mad Man series that had everyone humming it again. The song spoke of unity and tolerance, and as consumers, we gravitated to it and shared it.
The reason to make use or virality, the ease in spreading and sharing, is however a double-edged sword. We cannot forget that in this type of campaign, a large part of the control falls into the hands of the users, and we risk the message being misinterpreted or parodied. On the other hand, a successful viral campaign can work miracles for your brand’s results.