According to Wikipedia, TikTok is a Chinese video-sharing social networking service owned by ByteDance, a Beijing-based company founded in 2012 by Zhang Yiming. It is used to create short dance, lip-sync, comedy and talent videos. ByteDance first launched Douyin for the China market in September 2016.
Later, TikTok was launched in 2017 for iOS and Android in markets outside of China. It became available in the United States after merging with musical.ly on 2 August 2018. TikTok and Douyin are similar to each other and essentially the same app, however they run on separate servers to comply with Chinese censorship restrictions. The application allows users to create short music and lip-sync videos of 3 to 15 seconds and short looping videos of 3 to 60 seconds. The app is popular in Asia, the United States, and other parts of the world. TikTok and Douyin’s servers are based in countries where the apps are available.