Martin Sorrell

The investment case for Facebook Inc (NASDAQ: FB) couldn't have been made clearer to investors over the years: The rising popularity of the social media empire coupled with the decline of traditional media makes it a very appealing destination for advertisers. Facebook's dominance in social media...

Martin Sorrell, WPP chief executive officer, appeared on CNBC's Squawk Box to talk about the future of advertising and how it's doing in relation to the global economy. Currently, WPP has advertising deals with companies in 110 countries. Like all businesses, advertising has seen their share of...