someone suggested this idea 7 years ago, but it didn't gain enough popularity and was closed. i'm hoping this time it might gain more traction?
anyways, my (and other person's) idea is to add notes to songs in your playlist. for example, i have a playlist of songs that remind me some of my favorite otps, and i want to make a note or description for each song that allows someone listening to/discovering the playlist to know which otp the song references. i just think it'd be neat to share how songs are personally relevant/relatable to you :)