Mark W. Schaefer is a globally-recognized author, speaker, podcaster, and business consultant who blogs at {grow} - one of the top five marketing blogs of the world. He teaches graduate marketing classes at Rutgers University and has written six best-selling books including The Tao of Twitter (the best-selling book on Twitter in the world) and The Content Code, named by INC magazine as one of the Top five marketing books of the year, and his new book KNOWN: The handbook for building and unleashing your personal brand in the digital age. Mark also wrote the classic first book on influence marketing, Return On Influence. His many global clients include Pfizer, Cisco, Dell, Adidas, and the US Air Force. He has been a keynote speaker at prestigious events all over the world including SXSW, Marketing Summit Tokyo, and the Institute for International and European Affairs. He has appeared as a guest on media channels such as CNN, The Wall Street Journal, The New York Times and CBS News.