Having a high credit rating can give you better interest rates on credit cards, car loans and even your mortgage. (ARA) - The average American's credit score is 723. It's important to know the top factors that affect your score and check your credit report for accuracy. Borrowers can stay involved with their mortgage dealings by applying for a mortgage online. With traditional mortgages, lenders may not give out enough information, leaving the borrower practically in the dark throughout the whole process.