it's the currency for the bell tree forum. you gain bells by posting on the forums and making your own threads c: I prefer igb (in game bells), but a lot of people like tbt because they use it to get site collectables and you can buy a larger mailbox, buy access to make your title a different color, ect ect. if you click "shop" at the top you can check out things you can buy with tbt. so far, you have 9
on the topic of tbt, you can also store it in a bank on the forum. if you go to currency (which is beneath blog tree at the top of the page) it will take you to the bank where u can deposit and withdraw bells. another tip is that on this site, tbt are a little more prestige than igb (in game bells), merely because they are a little harder to obtain/it can take a while until you have a lot. however you can get some really lovely stuff on here for tbt so it's definitely worth it!