In 2016, paid search advertising accounted for about $35 billion, and was split almost evenly between mobile and desktop. This news comes from the IAB’s 2016 revenue report, which was released on April 26th.
Spending for mobile ad surpasses desktop spending for the first time, which represented 51 percent of digital spending in the US. In Q4 2016, it was at 53 percent.
In 2016, total digital ad spending was $72.5 billion, which is up from 22 percent from 2015. Mobile had been responsible for growth access in every digital format – display, social, search, video, and the like. Across formats, mobile spending came in just under $37 billion in 2016.
Growth of mobile ad spending in the US
Check out the more complete breakdown of the IAB report on Marketing Land.