More than 100 million Americans will tune in to watch the Denver Broncos and the Carolina Panthers duke it out at Super Bowl 50. And in between the plays, we’ll be bombarded by dozens of commercials, all competing for our attention. The next episode of BackStory tackles the tangled history of American advertising, from the nation’s first billboards to catchy jingles.

Learn more about your ad choices. Visit megaphone.fm/adchoices