Google and Facebook intensify their duopoly on digital advertising

Google and Facebook are deepening the stranglehold they have on the U.S. digital advertising market. The companies' duopoly over digital ad revenue will grow this year as ad spending reaches $83 billion, marking a 15.9 percent increase from 2016, according to a new report from eMarketer.
Google continues to dominate search engine advertising and Facebook's share of display and mobile ads is growing, according to the firm's latest forecast. Google is projected to end the year with 40.7 percent of