How does Google Display Ads drive marketing results for thousands of advertisers worldwide?

It harnesses best-in-class signals to place ads against the most relevant content.
It determines a user’s primary marketing objective, and enables the features and options that will best achieve it.
It calculates the number of times an ad is effectively run on test websites, then shows it on all relevant websites.
It focuses a campaign on either Gmail, TrueView, or Chrome to better isolate specific audiences.