Desktop search volume declined for the first time, while the share of queries from smartphones and tablets reached roughly 20%.
Impressive as the growth has been, the results are more noteworthy: US marketers that ran tablet- or smartphone-targeted search campaigns in 2012 saw clickthrough rates (CTRs) well above desktop averages, while cost-per-click (CPC) rates were below desktop norms. In 2013, eMarketer estimates US mobile search ad spending will top $3.5 billion and represent 18% of digital search ad spending, up from 11% in 2012. Read the rest at eMarketer.
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