Use the app to record a starting point (such as where you parked your car) and later on the app will direct you back to that location. Handy if shopping in an unfamiliar location.
When you save a location it will be remembered even if you reboot the device. Only an uninstall will lose the memory of the device.
You can overwrite the saved location by simply saving the current location again should you wish to.
Routing will be provided if possible, if it does not show up with the map then waiting a few seconds and clicking on one of the pins will show any data available.