Fortune reports Alphabet's online video service has grown from tween pastime to one of the world's largest sellers of digital advertising. Now it's poised to overtake the TV ad market—if it can maintain control of the wild universe of content it created. For context: If YouTube were a stand-alone entity, that would make it the world's fourth-largest seller of digital ads, after its parent company, Alphabet, Facebook, and Amazon. But what really has Wall Street salivating is the question of just how big it might get. YouTube's 2020 revenue was up 31% from 2019, compared with a 12.8% increase for its parent, Alphabet.
Inside the ad, ad, ad, ad world of YouTube
