You need a Google Account to sign in to Google My Maps, which is the Google Maps feature that has the options to save your locations of interest to a custom map. Any address you want to save for future reference is represented by a pin that you can add directly to your map. My Maps supports the addition of one pin or multiple pins on a single map.
Go to the Google Maps website and sign in to your Google account.
Click inside the Search field to reveal a drop-down box. If applicable, clear the Search field before you click inside it. Select My Maps from the drop-down box.
Select the Create button on the Make a Map box to open the Google My Maps page.
Enter the address of the location you want to pin in the Search field and click the Search icon. A green pin appears at the address of the location on the map.
Click the green pin to open a pop-up box that displays information about the location. For example, if the location is the Empire State Building, the pop-up box displays the building's full address, website and contact number. The amount of information displayed depends on the location. For example, a location in a sparsely populated rural area may have has less information than one in a city. Click Add to Map to pin the location to the map. The pin's color changes from green to red after the location is added to the map.
Click Untitled Map on the panel at the upper left corner of the page to open the Edit Map Title and Description dialog box.
Enter a title and description for the map. These are displayed when it is opened or shared. Click the Save button to save your new map.
Select the Pin icon under the Search field to add another pin to the map. Click the location on the map where you want to add the pin to open the location's pop-up box. Enter the name and description and then click the Save button to add the location to the map. All pinned locations appear on the panel at the upper left side of the page.