Creating a GOOGLE API key for developer integrated maps in wordpress
Make sure you are logged into the gmail account you wish to associate the API key to.
Click on the get started button
Select all 3 checkboxes (unless you are absolutely sure you do not need any of the others) and click CONTINUE
When prompted for a project , either select a current project or create a new one.
You will need to setup your billing account next or associate to an existing account.
Once linked you will receive a popup with your API key , copy it and send it to your developer or use it in your theme or plugin.