Global ad revenue will grow 4.8% to $536 billion in 2015, according to a new forecast from Magna Global. That's roughly in line with the group's last forecast, in June, when it said it expected 4.9% growth next year.
The top line is similar to another forecast, from ZenithOptimedia, predicting that global ad spending will rise 4.9% in 2015 to $545 billion. ZenithOptimedia revised its forecast downward by 0.4%.
Digital media will reach 30% market share globally in 2015, according to Magna Global, and it's on track to surpass TV revenue in the U.S. by 2017.
Ad revenue from digital media grew 17% to $142 billion this year, thanks to mobile campaigns and new social formats, Magna Global said. It's expected to increase another 15% in 2015.