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Global Digital Media Trendbook 2013 explores revenue and usage trends across digital platforms, including social media, video, mobile, tablets, internet and beyond in order to show where investment and strategy opportunities lie for media companies today and tomorrow.The Trendbook, in its eighth year, features more than 500 data sets from more than 65 major research companies from around the world including Accenture, Deloitte and Touche, Distimo, Forrester Consulting, Gartner, GfK, Global Web Index, Kantar Media, Mary Meeker, Pew, PricewaterhouseCoopers, socialbakers and ZenithOptimedia. GDMT is published by World Newsmedia Network, headed by Martha L Stone. The company is based in the United States and the United Kingdom.