real time bidding, banner ads, ad markets. Anything that comprehensively covers the history of web specific advertising is a good place to start. Even if ads a

real time bidding, banner ads, ad markets. Anything that comprehensively covers the history of web specific advertising is a good place to start. Even if ads aren't useful (getting leather belt ads after buying a leather belt... even ads for the same product), the incentive is to continue serving them because the company trying to sell shit is still winning to target all "belt searchers"