Get A Google API Key
Updated , see Google Sever key
Before you get started you will need to get a Google Maps API Key. Please note, there are some misleading instructions in the Google developer console telling you to restrict your API key when you move your site to production. The recommended way to do this for the majority of our WP SLP customers is to add HTTP referrer and add a geocoding key. The two key approach is available for version 4.9.15.
Step 1: Go To the Google Developer Site