Welcome to the Forum, @jamesmichaelhooker!
By default, you’re using a shared API key that we provide for free. Google sets a usage limit for that key that is shared between all users.
To use your own API key, add the Google API Service to your app:
Then enter your API key in the Maps API Key box:
Thanks for pointing this out, it is indeed not well documented! I’ll add a note to the relevant part of the reference docs.