Add Yahoo as a preferred source to see more of our stories on Google. John Oliver concluded this Sunday’s “Last Week Tonight” with a quick, but deep dive into how local car dealerships make their ads.

In 1969, a now-iconic commercial first popped the question, “How many licks does it take to get to the Tootsie Roll center of a Tootsie Pop?” This deceptively simple line in a 30-second script managed ...