Google still owns the biggest slice of mobile ad sales. But Facebook is increasingly carving up more of that pie, according to eMarketer.
The two giants together snagged more than two-thirds of last year's $17.96 billion in mobile ad sales, eMarketer reported Wednesday. Mobile ad spending worldwide surged by 105 percent last year and is forecast to jump another 75 percent this year to $31.45 billion.
Google is by far still the top recipient of all that spending, grabbing 49.3 percent of mobile ad revenue last year. But that number showed a small dip from 2012 … Read more