What does "Credits balance" on facebook mean?

On my facebook account, it says "Credits balance- 10 for purchasing virtual gifts and playing games on facebook". And above it, it says "Buy more". But I've never "purchased" anything on facebook nor have I played any of the games...... Does this mean I owe money or something? I thought facebook was free?


Owe, money? God no, American companies don't serve before you pay. It just free credits that Facebook gave you. You earn them by doing things on Facebook! You can buy more, to play games, buy Gifts, but Facebook will remove the feature soon, i think!