To get started using the API, you need to access the Google Developer console. In the Google Developers Console, follow these steps:
Create a new project.
Create your API key
When creating your API key, go to Credentials ▸ Select the “API key” option.
Create a “Browser Key”
Fill in the necessary details. Important: Remember to replace *.your-website-url.com/* with you actual website URL.
Once done. Create the key and then copy the key into your website under Customize ▸ Jobs ▸ Map Settings
Enable the API Services
In the API Manager click “Overview” on the left side of the screen and then search for the Geocoding API.
Click the Google Maps Geocoding API and Enable the service.
It can take up to five minutes for API keys to be fully created and take affect.