David is one of the world's best-known experts in online advertising. His two books on PPC advertising have trained a generation of marketers. A former Apple Computer executive and serial entrepreneur, David's career has been dedicated to helping companies of all sizes maximize revenue and profit.
His articles on PPC advertising have been published in MediaPost, Search Engine Watch, Search Engine Land and MarketingSherpa. He was the PPC expert faculty member for the online certification company Market Motive, and he hosted a weekly radio show called PPC Rockstars, distributed by Webmasterradio.fm and iTunes.
He is a frequent speaker at Search and Advertising industry events like Search Engine Strategies, SMX, Pubcon and ad:tech.