Washington -The market for mobile device advertising doubled in 2013 to $17.9bn and is on pace for strong gains this year, led by Facebook and Google, a market tracker said Wednesday.
The research firm eMarketer said mobile ad spending increased 105% last year and is expected to jump another 75% in 2014 to more than $31.45bn.
Facebook and Google grabbed the lion's share of the increase in 2013.
Google remained far ahead of its rivals, but saw its market share dip to 49.3% in 2013 from 52.6% in 2012, eMarketer said.
The biggest gains came from Facebook, whose market share jumped to 17.5% from 5.4% a year earlier.
Twitter also saw strong gains but its share was a modest 2.4% from 1.5% in 2012.
For 2014, eMarketer sees Google at 46.8%, Facebook at 21.7% and Twitter at 2.6%.
The huge growth in mobile ads show why these companies are concentrating on their mobile platforms.
According to eMarketer, just 11% of Facebook ad revenues worldwide came from mobile in 2012, but last year, that figure jumped to 45% and the figure will be around 63% this year.
Google is expected to get a third of its ad revenue from mobile this year, up from 23% in 2013, the report said.