The map view displays posts on a map - particularly posts that have location information.
Posts and the map area of the map view:
Each post appears as an icon (i.e. a marker/pointer) on the map. In the event that you opted to combine nearby posts on your Map settings page (Section 3.2 of this manual), posts adjacent to each other on the map will cluster together, displaying a number denoting number of posts combined.
Clicking on each individual post displays a small pop-up box with the post title and description.
You should also be able to zoom in and out of the map as desired.
Sidebar and Toolbar: See the page below for some more map view related information when it comes to managing data on your deployment through the sidebar and toolbar.