With half of every euro spent on digital advertising going toward search, it remains the most crucial channel for marketers to get right. It is a maturing category, with the demand for paid ads via search engines humming steadily. But when we take a peek under the hood, it becomes apparent that the gears driving this market are shifting furiously as marketers seek to reach users on a growing roster of devices. To assist marketers with this mission, our forecast includes an analysis of the shifts in search ad spending across PCs and mobile devices as well as 11 industry verticals in 17 European countries.