To activate your fenced pages, you need to create your pool location(s). Select the Geo-fencing tab and then click the “ADD” button in section 2. ADD / EDIT YOUR POOL LOCATION. Once you’ve opened the add / edit page, enter the location’s name and address. When you start typing an address, Google Places will find it for you.
Be sure to drag the Radius pin (located on the outer edge of the circle) to set the range within which your users must be positioned in order to view the fenced pages.