The worldwide mobile ad market is projected at $16.65

billion this year by eMarketer. That’s $8.85 billion for Google

and $7.80 billion for everybody else. eMarketer projects

that Google’s market share, which includes YouTube, will

be 53.17% in 2013, up slightly from 52.36% in 2012.

Meanwhile, Facebook’s continued emphasis on mobile

monetization, along with its users’ ongoing shift toward

mobile devices, is resulting in dramatic gains. eMarketer

says Facebook is expected to see its share of mobile ad

revenues reach 15.8% this year, up from

just 5.35% in 2012, which was the first

year that it had any mobile ad offerings.

Both Facebook and Google are

now the top ad publishers not only for

mobile, but for all digital as well. Across

all devices, Google remains by far the #1

digital ad publisher in the world and will

take in nearly 33% of all digital ad dollars

worldwide this year – that’s $38.6 billion out of a total pie

of $117.6 billion – eMarketer estimates, up from 31.46% in

2012. Facebook will also increase its share of the total, to

5.41%, while Yahoo! will lose some ground to under 3%

($3.5 billion). Microsoft’s share of the worldwide digital ad

market will hold steady at 2.5% ($2.9 billion).