What are Fraks?

Fraks are tokens of gratitude. Imagine you were given some special kind of money, but you can't use it to buy anything. You can't put it in a bank, exchange it, or earn interest on it. So what the Frak do I do with it, you ask? You give it away for free. You find people on Nool who inspire you to give a Frak, and you, well, give them a Frak!