Map markers are selected points marked as flags on the map. They provide useful information for direct-point-navigation on the map screen. More about this feature read here.
Navigation to the marker is direct-point-navigation. This navigation is made special for quick destinations. For example, during any off-road competitions.
User need to find or tap to the object on the map, click to it and choose Marker button in Map Conctext menu.
The flag on the object (Map marker) with line from your location to it (option).
Arrow, line and widget show object location and distance to it.