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 and is expected to inch down further in 2014. At the same time, Facebook's land grab for mobile ad revenue has been rising.
In 2012, the social network took home just 5.4 percent of worldwide mobile ad spending. That number surged to 17.5 percent last year and is expected to hit 21.7 percent this year. Facebook has made a concentrated effort to eke out more dollars from the mobile market. And that effort appears to be paying off, according to eMarketer.
In 2012, just 11 percent of Facebook's total ad revenue came from mobile. Last year, that figure rose to 45.1 percent and this year it could reach as high as 63.4 percent.