Tapping the screen places a push pin which seems to label what it is pointing at with a small square on its tip clearly showing where it is representing. Placing that precisely with a finger is not easy, and on a map that reaches a cluttered level of detail and with no POI labels it can be useful to bring up a description. When panning there is never any small square at the point of the pin and it only gives a distance and compass direction. On my Montana 680 I can point to roads, POIs, and areas to get a description of what it is and easily mark a point from it and it continues to give me that feedback when panning which makes precise positioning much more achievable.