Google+ and YouTube Fan Counts
You need to create a project on your Google Developer Console, then add the API's to that project. Finally, you need to create credentials to for your site to use. We created this step by step Gif that shows you all the steps:
Go to https://console.developers.google.com/project, then follow the steps below:
Now copy your API key to the settings field.
A lot of users are forgetting a "+" in front of their Google+ Page ID. For example, our ID is "+WPSmartercom" and not "WPSmartercom".