With WPP’s over 200,000 employees and a $75 billion media book, Sir Martin Sorrell has a uniquely privileged insight into the future of the online advertising industry. And he believes that 2018 mig
Sir Martin Sorrell, CEO of ad holding company WPP, weighed in on the digital media landscape today at the IAB MIXX conference in New York. One of his main arguments: That tech companies are also in th