If you want to book a hotel or make a restaurant reservation you can switch on the Transit Layer and look for the public transport line nearest to the location. If you want to travel from A to B you can quickly familiarize yourself with the public transport network and find out which lines to use and where to change.
Google Maps has added a public transit layer for more than 50 cities around the world to help citizens and tourists obtain information on getting around quicker. I see more European cities than U.S ones. It doesn’t take a genius to tell you what that means.