One of my favorite unconferences is the European edition of Stream, the WPP/Yossi Vardi hosted extravaganza held annually just outside Athens. Last year, I interviewed Sir Martin Sorrell, WPP’s ebullient CEO, about the global advertising economy. And this year, I had the good fortune to sit down with Mark Read, the CEO of WPP Digital, to talk more specifically about the company’s digital strategy. → Read More