Digital ad revenue in the US will grow 15.9 % this year , with Facebook 's advertising revenue projected to jump 15 % and Google 's by 10 % , according to eMarketer . Most of Google 's income comes from search , for which it claims $ 28.5bn of the $ 36.7bn market . However , by next year , Google 's search revenues are expected to fall in $ 32.4bn of the forecasted $ 40.5bn industry . For the mobile ad market , Google comprises 32.4 % of revenue , while Facebook generates 24.6 % . Google noted that Facebook - owned Instagram will make up 20 % of its parent company 's US mobile revenue this year , up from 15 % last year .
Digital ad spend in the US will grow 15.9% this year, with Facebook's ad revenue projected to jump 32.1% and Google's by 14.8%, according to eMarketer. Most of Google's income comes from search, for which it claims $28.5bn of the $36.7bn market. However, by next year, Google's search revenues are expected to bring in $32.4bn of the forecasted $40.5bn industry. For the mobile ad market, Google comprises 32.4% of spend, while Facebook generates 24.6%. EMarketer noted that Facebook-owned Instagram will make up 20% of its parent company's US mobile revenue this year, up from 15% last year.