Payment, Credit Cards and Interest Rates

Its really important for us to know as teenagers how to use a credit card. I never knew that we have to pay the bank back what we spend and on top of that they include interest. The people that work for banks are very sneaky when it comes to making money. Many people neglect the need to pay back what they owe which later turns into debt. Interest is not a good thing only in terms of savings its good, when we talk about credit cards interest is what we have to pay the bank when using a credit card.