Google Maps is a free desktop/mobile web mapping service developed by Google. Google Maps offers dynamic satellite imagery (high-resolution imagery of cities mostly taken from satellites), street maps, panoramic views of streets (called Street View service: provides 360° panoramic street-level views of various locations), real-time traffic conditions (called Google Traffic: traffic data in real-time, using 4 coloured lines on the map as an overlay to display the speed of vehicles on particular roads), and route planning (called Google Driving Directions in the US.).
On this page, Google provides a route planner service by clicking "Get Directions". With this tool, Google Map users are able to plan their routes up to four modes of transportation, depending on the area: driving, public transit, walking, and bicycling.
Use this tool on the left side of the map to get accurate directions between any points using Google Maps. Just enter a city, a zip code, or an address above in both the From (A) and the To (B) address text fields. Click Get Directions button, and the map will display the best route you need to take to get from your starting point to your desired destination. The turn by turn directions also will be displayed near the Google Map, and will contain the distance and approximate time as well it will take to get from one location to the other.
Google Maps in combination with Google Street View, issues such as parking, turning lanes, and one-way streets can be viewed before traveling, but it is also very a popular tool worldwide to avoid tolls and highways during a car travel. Read more about Google maps here on Wikipedia.