GroupM reports that US ad spend growth this year will rise 6.2% to hit $244 billion and increase by 4% during 2020, with a 7% drop in TV ad investment, which, excluding political advertising, will reach $64.3 billion in 2019. The company projects digital ad spend growth of 20% in 2019 and 13% in 2020, while out-of-home advertising is up 8% this year.