The report was based on Zenith's global advertising data for past years as well as spend projections through 2019.
Internet ad spend is expected to reach $205 billion in 2017, and projected to account for 37% of all global ad spend this year, up from 34% in 2016.
Advertisers are expected to spend $192 billion on traditional television advertising in 2017.
Mobile is expected to be the main driver of global ad spend growth through 2019.
Spends on desktop Internet, magazine, and newspaper advertising are all projected to decline over the next three years.
Ayaz Nanji is an independent digital strategist and a co-founder of ICW Content, a marketing agency specializing in content creation for brands and businesses. He is also a research writer for MarketingProfs. He has worked for Google/YouTube, the Travel Channel, AOL, and the New York Times.
LinkedIn: Ayaz Nanji