The growing popularity of mobile devices has helped Google increase its dominance of global advertising revenues, with the web search giant’s income from media spending more than twice its nearest competitor. The Silicon Valley giant had media revenues of $50.6bn (£32.8bn) in 2013/14 according to new research, dwarfing the next largest player, the Walt Disney Company, at $20.3bn. ZenithOptimedia’s annual industry round-up ranks companies by media revenues, which it defines as those from businesses which support advertising.