Chart - American Mobile Marketing Spending

The mobile marketing ecosystem is demonstrating rapid growth, with $6.7 billion spent by client-side marketers and retailers in 2012, according to a study commissioned by the Mobile Marketing Association (MMA) and conducted by researchers at Columbia University. That investment should grow to $10.5 billion this year before ballooning to $19.8 billion in 2015, with close to half of that ($9.2 billion) coming from mobile advertising alone.

Last year, mobile became the third-largest online advertising format by share of revenues, owing to 111% year-over-year growth, according to a recent report from the IAB and PricewaterhouseCoopers. Read the rest at MarketingCharts.