An Owner's Policy provides assurance that your title company will stand behind you --monetarily and with legal defense if needed -- if a covered title problem arises after you buy your home. The bottom line is that your title company will be there to help pay valid claims and cover the costs of defending an attack on your title.
Sometimes title problems occur that could not be found in the public records or are inadvertently missed in the title search process. To help protect you in these events, it is recommended that you obtain an Owner's Policy of Title Insurance to insure you against most unforeseen problems. It is a one-time fee, paid at closing, and protects you for as long as you or your heirs have an interest in the property.