TikTok is a social media app/website that allows millions of people to post videos using different music and sounds (original and unoriginal). The app was originally owned by a separate social media app called Musical.ly that belong to the company Musical.ly inc. But, ended in November of 2017, and was Taken over by another company, ByteDance, that was a separate app and merged Musical.ly's data into TikTok in August of 2018 .