Earlier this week, AdAge published some findings from the ARF that discussed the importance of advertising in sparking Word of Mouth. The discuss the empirical findings that the most effective TV advertising (which is still a very effective medium in their view) are the ads that generate the most talk. They go on to quote Ed Keller, author of the book The Influentials, saying that 22% of all WOM conversations about brands are sparked directly by advertising.
In a world where sharing is the new media, friendship is the new currency and advocacy is the new goal; the role of advertising will increasingly be to get people talking about your brand. Preferably in a good way if they're your target, and a bad way if they're not (that's a whole other blog post.)

