Creating a Google API key is very easy, and can be done following this URL. If you follow this given URL, some services like the "Static Maps" and "Geocoding API" should be activated during the app creating.
Keep reading to see how to make sure the correct API service have been enabled.
Create a new project and choose a name for your new Google API key. Don't define any key restrictions until you make sure your key is working just fine. Once confirmed, you can add a HTTP referrers (web sites) restriction for example to limit the API key usage by only your domain pages.
At the end of this step you should have an API key that you can copy paste in your projects. You can also check the Google API key validity when used in our apps, using this Google API key checker
From the Google API interface, click on "Library" and search for both "Static Maps" and "Geocoding services" and make sure they are both enabled. That should be it !
You should have a working Google Maps API key! If you have any questions feel free to contact us or post in the comments here.