The Health Insurance Marketplace is a service that helps individuals and families shop for and enroll in affordable health insurance. Established under the Affordable Care Act, it provides a platform where users can compare different health plans based on coverage, costs, and benefits. Through the Marketplace, eligible individuals may qualify for financial assistance to lower their premiums and out-of-pocket costs. It aims to increase access to health insurance and improve the overall health of the population by making coverage more affordable and accessible to everyone.