One of the golden rules of advertising is that money follows eyeballs. And since people are looking at their smartphones pretty much all the time these days, it’s no surprise that advertising budgets are shifting to mobile devices as well.

According to Zenith’s latest global advertising forecast, advertisers will spend an additional $80 billion a year on mobile ads in 2019 compared to this year. By then, mobile devices will have overtaken the desktop internet to become the second largest advertising medium behind television. Zenith expects annual mobile advertising spending to reach $160 billion by 2019, well ahead of the $88 billion expected to be spent on non-mobile online ads.

Source: • Chart: Money Follows Eyeballs – Mobile Ad Boom Continues | Statista