I was exploring this today and just clicked on the "maps" Platform or APIs & Services to just explore and it immediately popped up a screen with "This is your API key for maps to start using!" without my input.

It sent me to a url: https://console.cloud.google.com/google/maps-apis/onboard;fl...

which auto-generated an API key for me to paste into things ASAP.

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Get Started on Google Maps Platform You're all set to develop! Here's the API key you would need for your implementation. API key can be referenced in the Credentials section.