Marketers at 300 U.S.companies increased their mobile advertising budgets by 142% from 2011 to 2013. A 2013 survey conducted for the Interactive Advertising Bureau found one-third (33%) of these companies allocated more than $300,000 to mobile advertising , compared to seven percent (7%) in 2011. More importantly, seventy percent (70%) of these companies predict their mobile advertising dollars will grow significantly over the next two years as U.S. Smartphone and tablet users increase. Marketers deliver their mobile ads in various forms. Seventy percent (70%) use mobile website ads, forty-nine percent (49%) use banners, and forty-one percent (41%) use mobile messaging. The Interactive Advertising Bureau is composed of 600 media and technology companies that are responsible for selling 86% of all online advertising in the U.S.