Open Enrollment is a specific period during which individuals can sign up for or make changes to their health insurance plans. This time frame typically occurs once a year and allows people to enroll in plans offered through their employer or the Health Insurance Marketplace. During Open Enrollment, individuals can choose from various coverage options, update their personal information, or switch plans if their needs have changed. It is important to review available options carefully, as changes made during this period usually cannot be altered until the next Open Enrollment period, unless qualifying life events occur.