Recently, a slew of states and even the federal government have banned the Chinese-owned social media app TikTok from government-issued devices, citing national security concerns. WSJ's Stu Woo explains what's going on. Further Reading: - TikTok Wins a Vote in South Dakota  - TikTok Ban Debate Moves From Washington to Main Street  - TikTok Security Dilemma Revives Push for U.S. Control  Further Listening: - How TikTok Became the World’s Favorite App  - Teens Are Developing Tics. Doctors Say TikTok May Be a Factor.  Learn more about your ad choices. Visit megaphone.fm/adchoices