Credit. Every time you use a credit card, you are actually borrowing money that is made available to you by a bank or other financial institution. The institution pays the debt to the vendor, and in turn, you pay the money back to the institution. By signing up for a credit card, you agree to pay back the money that you borrowed, in addition to any interest drawn on the amount you borrowed.
Debit. Issued by your bank, debit cards take funds directly from the money that you have in your bank account--in a sense acting like a check, just faster. With a debit card, you don't have to carry cash or checks, and it is very convenient to shop at a variety of places including gas stations, grocery stores, restaurants, and retail stores. They provide instant access to your money and are accepted worldwide.
Debit. instant access to your money, lack of a PIN number, and not having to drag out your photo ID when you use it--make fraud that much easier. Unless reported quickly, theft of your debit card can quickly devastate your bank account.
Credit card companies are held to strict liability laws; the law limits consumer liability for credit card fraud to $50. For example if you notice suspicious charges on your credit card statement such as double billing or an incorrect charge, the credit card company is obligated to investigate if you send in a written request within 60 days.