Make corrections to Google Maps
Google Maps, MapQuest, and similar services are very useful for getting directions on how to drive somewhere. However, we are talking about computer-generated directions and, like anything from a computer, the results are not always optimal. Sometimes the directions go out of the way in order to include an interstate highway or do not include some desired mid-point. I use mapping services all the time and sometimes the results even border on the bizarre. So it is a nice step forward that Google Maps has added a function that allows you to drag the computer-generated route with your mouse to include places that you wish to add or to modify the routing.