Your credit rating is a sign of your responsibility. For a serious, especially white collar, job it shows how trustworthy, responsible, and "grown-up" you are.
Also, a credit report shows a bit of your financial condition, since the credit card companies report your credit line and how much of that credit line is in use. If you're $40,000 in credit card debt and applying for a $30,000 a year job, the employer might worry that you might steal on-the-job.
I recommend going to the source, such as Equifax. You can get a basic credit report for $9.00. I've used them before and can recommend them.
https://www.econsumer.equifax.com/co...landing.ehtml?^start=&orderSource=EHC&PP=P1