In some cases, the user should complete all aspects of the search form before presenting results. In other cases, users like to see results reflected immediately as their selections change. In combination with the Initial State (Show nearest) it allows automatic searching based on the visitor's location and a map that is responsive to dragging and zooming.
Live Search enables the behavior where search form changes and map movements update the results immediately without requiring the user to click the Submit button. Enable live search as shown below.
This video shows the live search option in action.