Reaction in the fan circle means that fans or idols record their reactions to videos. After many idols shoot a video, they will also pay attention to various aspects of the video's performance, and then record their reactions after watching the video, and many fans also behave in this way. The videos shot in this way are still very interesting and can bring a different kind of fun. Of course, idols and fans have different starting points for watching videos.

Fans follow idols’ every update and video because they like idols, and idols watch their own videos because they want to find some sense of identification with their fans. Through the observer's mentality, idols will observe fans' reactions when watching videos, thereby giving themselves greater room for improvement and making progress from these reactions.

There are also some fans who will also watch the reaction of another group of fans watching their idol videos. These fans want to find the buzz from others. Of course, they don't want to see the reactions of other fans slandering their idols. This method is still very good. It can not only help idols improve themselves, but also enhance the relationship between idols and fans.

If idols want to maintain their image and status in the minds of fans, they must continue to improve. Only by showing the freshest talents to fans can we gain their long-term support. Fans are like food and clothing parents to idols, and they also indirectly determine the future development direction of idols' careers. Therefore, almost every idol attaches great importance to fans' reactions to watching videos.