Nielsen’s recent release of the Fourth Screen Report claims that 237 million ad exposures reached adult audiences in measured digital location-based networks. The report, called the “Fourth Screen Network Audience Report” (Nielsen is calling it the “fourth screen” after television, the computer and mobile), was released last Monday. It researched 10 screen networks, from companies like NCM Media Networks and Screenvision, which run ads in movie theaters, to Gas Station TV, which places screens on gas pumps.