Obamacare, officially known as the Affordable Care Act, is a comprehensive healthcare reform law enacted in 2010. Its primary goals are to increase health insurance coverage, lower healthcare costs, and improve healthcare system efficiency. The law introduced measures such as the Health Insurance Marketplace, where individuals can purchase insurance, and expanded Medicaid eligibility for low-income individuals. The legislation also includes provisions to protect consumers, such as prohibiting insurance companies from denying coverage due to pre-existing conditions. Overall, Obamacare aims to make healthcare more accessible and affordable for millions of Americans, significantly reshaping the U.S. healthcare landscape.