When writing a copy for a Tik Tok video, you need to consider factors such as the video content, theme, and target audience. You can use interesting, humorous, and emotional language to attract user attention and interaction. At the same time, you should concisely express the core information and theme of the video so that the audience can gain something and resonate with it. It is best to use attractive thumbnails and tags to increase the video's exposure and dissemination effect.