Go to google clould console, if you do not have an account, create one. then create a project.

Step 01: Click on the Create Project button

Screenshot

Step 02: give project a name, then click on Create.

Screenshot

Step 03: Select your project from here which you have just created

Screenshot

Step 04: go to Api & Services > Enable Api & Services

Screenshot

Step 05: Click on enable apis and services

Screenshot

Step 06: Click on map javascript api

Screenshot

Step 07: click on enable button.

Screenshot

Step 08: go back and now click on Places api and enable it

Screenshot

Step 09: Go Back and now click on Geocoding API and enable it.

Screenshot

Step 10: now go to APIs & Services > Credentials

Screenshot

Step 11: Click on create Credentials.

Screenshot

Step 12: Now click on Create API Key.

Screenshot

Now save it, and make sure you have added the below url to your Add Website List. Do not forget to replace yourdomaim.com with your own website URL.

https://yourdomain.com
https://yourdomain.com/*
https://yourdomain.com/service-list
https://yourdomain.com/service-list/
https://yourdomain.com/service-list/book-now/*

that is all for configure google map api key