The No. 1 social networking app on Apple’s U.S. app store right now is called BeReal, as in being your real self online. No filters, no carefully staged shots. The concept, and the format, are so popular, TikTok launched its own version — both on its home app and as a standalone — called TikTok Now. Marketplace’s Kimberly Adams speaks with Erica Bailey, a Ph.D. candidate at Columbia University Business School, who studies authenticity and marketing. On BeReal, Bailey said, you can only post once a day and only when you receive an alert, which can come at ANY time.