Group health insurance is employer-sponsored health coverage for business owners and employees. Often times, group health insurance also covers spouses and dependents. The majority of health insurance plans in the marketplace are through employer-sponsored plans. The advantages of having health insurance through your employer is that the premium is shared by the company so what you pay is less than private health insurance. From a company standpoint, their are tax incentives in providing health insurance for your employees, and more importantly, it will allow you to retain high quality employees because of the benefits you are providing them.