A credit score is a numerical summary of a consumer's apparent creditworthiness, based on the consumer's credit report, and reflects the relative likelihood that the consumer will default on a credit obligation. Credit scores can have a significant impact on a consumer's financial life. Lenders rely on scores extensively in decision making, including the initial decisions of whether to lend and what loan terms to offer, for most types of credit, including mortgages, auto loans, and credit cards. Credit scores also influence the marketing offers that consumers receive, such as offers for credit cards. A good credit score can mean access to a wide range of credit products at the better rates available in the market, while a bad credit score can lead to greatly reduced access to credit and much higher borrowing costs. This book provides context for understanding the credit reporting industry as a whole, important industry players, and the complexity of the credit scoring process.