The Map View displays your data as a layer on a map. The location of each data record collected is represented as an inverted tear drop on the map.
Select the Form you want to view (A) and click Map View (B).
Click on an individual tear drop and you will see a small list of the data collected in that record. A red X will appear on the Map View if the Record has been copied.
Simply put, Map View creates a visual representation of the location of all data collected.