![Global Online Ad Spending, 2012-2018 [CHART]](http://www.emarketer.com/images/chart_gifs/174001-175000/174894.gif "Chart - Global Online Ad Spending")
On a long-term basis, digital channels will continue to drive advertising growth across the globe. eMarketer estimates that digital ad spending will increase 16.7% this year, totaling $140.15 billion and surpassing 25% of all media ad spending for the first time.
Within the digital category, advertising on tablets and smartphones continues to be a key catalyst for growth. Mobile ad spending worldwide will increase 84.7% in 2014 to reach $32.71 billion this year, eMarketer estimates, totaling nearly one-quarter of all digital advertising spending (which includes paid media spending on ads of any format delivered to any internet-connected device). Read the rest at eMarketer.
The e-Strategy Academy covers all aspects of digital marketing including search optimization & marketing, email marketing, social media marketing, video marketing, mobile marketing & public relations.