Home warranties cover items in your home that are breaking or malfunctioning. The home warranty company you contract with will send someone to help you fix it, pay for any damage, or replace the item altogether.
A plan purchased when you first buy a new home can be beneficial because it can provide a buffer to fixing common problems that may arise, especially in that first year when you're adjusting to new appliances and a new environment.
If you are unsure if it's the right choice for you, you can ask the seller of a house you are interested in buying to pay for a one-year warranty. In this scenario, you will be able to choose the home warranty company.