Your credit score is a three-digit number calculated from the information found in your credit report. Your credit score tells lenders how likely you are to pay back the money you borrow based on your credit history. Your creditors report your activity about once a month to a credit reporting agency (credit bureau).
There are different credit scoring models from each credit bureau. Plus, not every credit card issuer reports to all three major credit bureaus, so you may see a different credit score from each source.