The best place to learn about Medicare is at Medicare.gov, the official Medicare website created and managed by the federal government. The following is from their website:
Helps cover inpatient care in hospitals, skilled nursing facility care, hospice care, and home health care.
Helps cover services from doctors and other health care providers, outpatient care, home health care, durable medical equipment (like wheelchairs, walkers, hospital beds, and other equipment), many preventive services (like screenings, shots or vaccines, and yearly “Wellness” visits)
Helps cover the cost of prescription drugs (including many recommended shots or vaccines). You join a Medicare drug plan in addition to Original Medicare, or you get it by joining a Medicare Advantage Plan with drug coverage. Plans that offer Medicare drug coverage are run by private insurance companies that follow rules set by Medicare.
When you first sign up for Medicare and during certain times of the year, you can choose which way to get your Medicare coverage. There are two main ways: