Credit scores are used by financial providers to estimate a consumer's creditworthiness.
The score is a picture of you as a credit risk to the lender at the time of your application. The higher the score, the better a borrower looks to potential lender, but not everyone has a good credit rating.
People can have a low score for a number of reasons. Common causes include failing to pay the bare minimum on a credit card each month, or multiple loan applications.