Tbt bells?

I only started on this site today since I didn't know of its existence until recently, but I have heard people talking about tbt bells? Do any of you know what they are and how you get them, thank you for any information <3

They are for buying and selling collectibles, art, New Leaf items etc. and can be obtained by posting in most forums/threads here except Bulletin Board and Basement (iirc, feel free to correct me).

You can also sell NL services and items, art, or collectibles etc. in order to earn them.

Make sure to read the rules first though and don't go spam everywhere just for bells

Thank you for telling me! The help is greatly appreciated <3