It has been a part of most major AI open source projects lately, for some reason: https://sigmoid.social/@minimaxir/110951886465291229
It’s just injecting a little bit of life and visual variance into the text.
The best way to inject a little bit of life into a text is with engaging and vibrant writing, not putting colourful stickers all over it.
I guess the sticker thing works for 6 year olds though.
Personally I feel the (excessive) colors can be distracting, but that's just my view.