How Does TikTok's Algorithm Know You So Well?

The algorithm TikTok uses to serve up engaging videos has been the source of much speculation. Now an investigation by The Wall Street Journal reveals how the technology behind the fastest-growing social-media platform works. Senior Personal Tech Columnist Joanna Stern joins host Zoe Thomas to discuss the findings and what they mean for users. Learn more about your ad choices. Visit megaphone.fm/adchoices