The Employees' State Insurance Act of 1948 provides health insurance and other benefits to employees in India. It originally aimed to provide sickness, maternity, and medical benefits to factory workers and their dependents. Over time, it expanded to apply to other establishments employing a minimum number of people. Key benefits include sickness benefits, maternity benefits, disablement benefits for work-related injuries, dependents' benefits, medical care, and a funeral benefit. Employers must register eligible establishments and employees with the Employees' State Insurance Corporation. The act aims to secure health and financial protection for employees and promote social security.