United Airlines (UAL) is considering targeted ads using passenger data according to the Wall Street Journal. These ads could appear on in-flight entertainment and the app used to book tickets and check-in. UAL may join companies like Walmart (WMT), Uber (UBER), Instacart (CART), and Home Depot (HD) in using customer data for its ad business. Jenny Horne weighs in on this story. Tune in to find out more about the stock market today.