Online advertising expert David Szetela is the former Owner and CEO of Clix Marketing, a pay-per-click (PPC) advertising agency. During his extensive career he's worked for small magazine publishers as well as Apple Computer and Ziff-Davis Publishing, giving him deep experience in international business, general management and direct response marketing.

His articles on PPC advertising have been published in MediaPost, Search Engine Watch, Search Engine Land, MarketingSherpa and on his former company's blog. 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.

His book on PPC Display Advertising, Customers Now, was published in November 2009, and his Wiley/Sybex book, PPC Advertising on One Hour a Day, was published in July 2010. He was voted Top PPC Expert in a poll of thousands of PPC managers and web site owners. He's one of the top CMOs and top advertising experts to follow on Twitter.

He runs the LinkedIn group PPC Pro People and maintains the Twitter list PPC Advertising Experts.