Always use a debit card instead of a credit card. Debit uses your own money (pulled directly from your bank account) to pay for something. It’s basically like cash, except you get the convenience factor of using your debit card instead of carrying around a big stack of cash when you make a purchase.
When you pay for something using credit, you’re borrowing money from a lender to cover that purchase instead of using your own money. And if you don’t pay back the money on time, you’ll be socked with interest. These are not the kind of socks you want!