gremlin/Getty ImagesBy Jeff Green, co-founder and CEO, The Trade DeskWhen Google went public in 2004, co-founder Larry Page made a commitment to shareholders and the world. A well-functioning society, he wrote in his founder's letter, should have abundant, free, and unbiased access to high-quality information.For 20 years, Google kept that promise by doing one thing well: It connected its visitors to other companies' content. You asked a questio…