You will need to create a Google API key and enter it into the GoogleAPIKey Site Properties attribute.

This API gives you the distance to the destination address given the origin address as reference point. Multiple addresses can be passed as origin addresses as well as destination addresses. The addresses can be in string or coordinate format. Use the pipe "|" delimiter when using multiple values. See the Google API documentation for more information

Some values are currently set as default, such as the transport mode ("driving") and units ("metric"), but you are welcome to help built this module out to include all possible Actions to interact with the Distance Matrix API.