Google Maps is an online mapping and route planning service provided for free by Google, which allows you to create and save custom maps. This feature, called "My Maps," includes the option to position markers in specific locations, and to add annotations and interactive details to your selected mapping locations. These custom-made maps can then be saved for later viewing, or made public and shared with other Internet users.
Open the Google Maps page in your Web browser by visiting maps.google.com and click the "Sign In" link in the upper-right corner. Enter your Google account username and password, and click the "Sign In" button.
Click the "My Maps" link at the top of the left hand column on the Google Maps page.
Click "Create New Map" and enter a title and description in the relevant boxes. Check the radio button to determine whether the map will be public or private.
Click the "Add a placemark" button in the upper-left corner of the map window to pick up a location pin. Click on the map where you would like to place the pin to identify one of your mapped locations.
Enter a title and description for the placemark pin and click the "OK" button.
Repeat the procedure until you've mapped all the locations using the placemark pins. You can add as many placemark pins as you like. The Google Map will be automatically saved into "My Maps" after each change is made.
You can share the custom map with specific people by clicking the "Collaborate" link in the left hand column and entering their e-mail address into the "Invite collaborators" box. This only allows the authorised collaborators to see the map, and doesn't make it public.