How TikTok reshaped the trend cycle.This episode was produced by Danielle Hewitt, edited by Amina Al-Sadi, fact-checked by Laura Bullard, engineered by Patrick Boyd, and hosted by Sean Rameswaram. A young woman holding an iced matcha latte. Photo by Jens Kalaene/picture alliance via Getty Images.Listen to Today, Explained ad-free by becoming a Vox Member: vox.com/members. Transcript at vox.com/today-explained-podcast.Learn more about your ad choices. Visit podcastchoices.com/adchoices