When one of your TikTok videos is reposted by another user, it will be visible on their “For you” feed, and their followers and followings can view it from there. When someone shares or reposts a video from you, they are also given the option to tag you in the post so that their followers can see who originally created the content.  This allows you to gain more visibility among other users on the platform and potentially gain new followers. Additionally, any likes or comments that come from sharing your content will be credited back to your profile as well.