I bet you're wondering why the bank would give you money for saving your money! It doesn't seem to make much sense, does it? Well, there's a very good reason! You see, when you save your money in the bank, it doesn't just sit there waiting for you to come back and get it. The bank uses your money to make more money. In a way, when you save your money, you're really loaning it to the bank. Interest is what the bank gives you for letting them use your money to make more money.