As a business owner, you need the same kinds of insurance coverages
for the car you use in your business as you do for a car used for personal travel -- liability, collision and comprehensive, medical payments (known as personal injury protection in some states) and coverage for uninsured motorists. If the vehicle is owned by the business, make sure the name of the business appears on the policy as the "principal insured" rather than your name. This will avoid possible confusion in the event that you need to file a claim or a claim is filed against you.
Whether you need to buy a business auto insurance policy will depend on the kind of driving you do.