Some insurers use credit scores to determine how much they should charge someone for premiums.
If you have poor credit, this can sometimes works against you because your insurance company might view you as a higher risk than someone with good credit.
You should be sure to check your credit rating at least once a year and make sure the major credit reporting agencies have the correct information. If there are any inaccuracies, you should correct them immediately so the insurance company is pulling the most up-to-date credit history on you.
Keep in mind that not all insurance companies check credit scores and you should ask yours if this is a determining factor.