How the sky became a giant billboard

Quick, think. You’re the CMO of a big brand, and you need to make a splash with your next campaign. You have the cash, but billboards are passé, TV is a bore unless it’s the Super Bowl, and the internet says that influencer marketing is out. What do you do? An increasing number of brands have been turning to an unlikely place to promote their products and services: the sky. And they have used an increasingly popular tool to do it. In the past few months alone, Lego Group flew 400...