In the U.S. total ad spend surpassed $243 billion in 2019 and will reach exceed $329 billion by 2025. But how this money is being spent is rapidly changing as mobile, social, and digital video are reshaping the U.S. advertising landscape. This report examines how ad spend is shifting between traditional advertising (TV, print, radio, cinema,OOH) and digital (search, digital video, non-video display, social, podcasting, internet radio, classified).