Mobile is responsible for an increasing share of traffic to local search apps—like Citysearch, YellowPages.com and Yelp—as users turn to the app directories for on-the-go information. Research from the Local Search Association and comScore found that in December 2012, the share of traffic to these sites from mobile phones and tablets quadrupled over the previous year. In addition, not only are these local mobile search app users accounting for a significant share of local internet directory traffic, they also have plenty of demographic and behavioral characteristics to further recommend themselves to marketers. The study found that US smartphone users who accessed internet yellow page mobile apps (IYP users) - the generic name for these local search app services—were highly likely to be affluent consumers. IYP users were 51% more likely than smartphone users overall to have incomes above $100,000. Get the full story at eMarketer