Google Api Key Kullanımı. Generate an api key through google api console. If billing is already enabled then this option isnt available.

Once you logged in with your email and password the following will appear. This api key written in json connects your site to the google cloud. From the projects list select a project or create a new one.
A google maps api key is a personal code provided by google to access google maps on this site.
I see that you have a ip specified aswell. To restrict an api key. Go to the google maps platform credentials page. Select the api key that you want to set a.