An official concept for the notification center, also including the little bubbles to indicate there's a notification in your box :) . (Also if you are colorblind in any way and the symbols in the bubbles are hard to see, please let me know, I am trying to figure out good options to make it colorblind friendly-) . Ping notification would mean stuff like if someone you follow posted stuff (if you had notifications turned on for that user-) or if someone tagged you, basically stuff that you might want to be notified about, but not stuff about you directly- . Personal notifications are if someone follows you, likes your post, comments on something of yours, stuff directly about you . Warning notifications would most likely be exclusive to moderator notes (like warnings for misbehavior, info on mutes and/or bans) . The ranking of the bubbles (since only one bubble type would appear at a time) is ping (lowest), personal, and warning This means if you have a ping notif but also have a warning notif, you would only see the warning bubble since that one is deemed most important.
Art by Inky @Inkdrop-Nightcloud (They/them or any/all) The bell had more votes so thats what I did here :D