A tool for businesses to see which hashtags are popular and what's trending, thus having better insights into what to post for their content.
I know a tool that can help you quickly find popular tiktoker, and quickly find TIkTok tags, music, and videos suitable for businesses.
https://www.gugeedata.com/video/likes/all
I think that's fairly valuable. You could start in that niche, then expand out to other networks.