Aetna is a healthcare benefits giant that provides health insurance and other related services to millions of people in the United States. It is one of the largest health insurance companies in the country, offering a wide range of plans for individuals, families, and businesses. AETNA also offers a variety of supplemental benefits, such as vision and dental coverage, as well as prescription drug coverage. Additionally, AETNA provides access to a network of doctors and hospitals, and offers discounts on medical services.