David is one of the world's best-known experts in online advertising. His two books on PPC advertising have helped train a generation of marketers. His articles on PPC advertising have been published in The SEM Post, MediaPost, Search Engine Watch, and Search Engine Land. He hosts a biweekly podcast called PPC Rockstars, produced by Webmaster Radio and distributed by iTunes and other major outlets.
David is a frequent speaker at Search and Advertising industry events like SMX, Ungagged and Pubcon. He was recently judged one of the top 25 PPC experts worldwide by PPC Hero.