What's the best example of content marketing in 2013? With so many great examples this year it's really a matter of opinion. But what do the experts think? Hear what some of today's top thought leaders in the space find out what their favorite examples of content marketing are this year, and why they think these examples are so effective. Check out the responses from content experts Jay Baer, Ann Handley, Aaron Kahlow, Joe Chernov, Michael Brenner, Michael Stelzner, and Joe Pulizzi.