An "Unknown" place is a location that has not yet been named.
Simply click on "Give a Name', type in the name in the text box, and press "Enter".
The AngelSense system automatically labels a location as "Unknown" in your Timeline if your child is there for 5 minutes or longer. You will be sent a notification that your child is at a location that you haven't named yet after the device has been at that location for more than 10 minutes.
The GPS updates every 30 seconds in Unknown places for the first 10 minutes and then will begin updating every 15 minutes. Upon moving from the Unknown place, the device will be begin updating every 30 seconds again. We suggest naming places your child visits regularly to increase battery life and also so that you can receive notifications when your child leaves the place.
If the "Unknown" location occurs while your child is at a named location, this is essentially the result of GPS errors indoors and you probably need to expand the radius of that location to cover the entire area. See more on Handling False Notifications).