When you apply for credit – whether for a credit card, a car loan, or a mortgage – lenders want to know what risk they'd take by loaning money to you. FICO® scores are the credit scores most lenders use to determine your credit risk. The higher the credit score, the lower the risk for lenders.
You have three FICO scores, one for each of the three credit bureaus: Experian, TransUnion, and Equifax. Each score is based on information the credit bureau keeps on file about you. As this information changes, your credit scores tend to change as well. Your 3 FICO scores affect both how much and what loan terms (interest rate, etc.) lenders will offer you at any given time. Taking steps to improve your FICO scores can help you qualify for better rates from lenders.
More information on credit scores and how to interpret them.