It really is something else. I saw TikTok on TV a lot and it seemed just an extension of it's previous incarnation, Musical.ly: just being dancing around and singing.
Then I installed it to see. I was blown away. Within minutes we'd got away from the goofy stuff to genuinely awesome content about mental health that was really life-changing for me.
I love TikTok. I reserve 30 mins at bedtime each night for it. Swapping videos we've found by DM is one of the fave things my gf and I do.