Google requires that you obtain an API code in order to use their maps services. This is a recent requirement that means you must visit their site and have one generated.
The first step towards getting your code is to visit this site:
Once you get there, click the “Get Key” button.
Select “Create New Project” from the pop-up drowpdown.
Copy your new API key
Paste it in Theme Options> Misc Settings and hit “Save Changes.”
Check your contact page (if you’ve got a map configured there) or anywhere on your site that’s using a Google Map. Your inputted address should be reflected on your map.
If you need to edit any of your Google Map API’s, you can delete, rename, and adjust the security settings of each one here: