If you've ever seen a split-screen video on TikTok where one creator is responding to another video, you've seen a duet — one of the app's most unique features. Regularly appearing on the For You Page ...

Find the post you want to Duet. Click the “Share” button, which is the pink arrow below the bookmark icon on the bottom right of the screen. Click the “Duet” button. In some cases, a user may not ...