The Evolution of Media Buying by Chris Trayhorn, Publisher of mThink Blue Book, October 16, 2014 If you want to remain competitive in online marketing of any kind, you need to understand how to buy traffic. The most cost-effective source most of the time is display: inventory is almost infinite, and rates are cheap. But media buying display advertising is changing rapidly as the programmatic revolution takes over. Google released a great infographic last week which illustrated just how fast things are moving. Filed under: Revenue Tagged under: Media Buying, programmic buying About the Author Chris Trayhorn, Publisher of mThink Blue Book Chris Trayhorn is the Chairman of the Performance Marketing Industry Blue Ribbon Panel and the CEO of mThink.com, a leading online and content marketing agency. He has founded four successful marketing companies in London and San Francisco in the last 15 years, and is currently the founder and publisher of Revenue+Performance magazine, the magazine of the performance marketing industry since 2002.