Steps:
https://developers.google.com/maps/documentation/javascript/add-google-map-wc-tut?hl=en#step-3
https://developers.google.com/maps/documentation/javascript/add-google-map?hl=en
Price:
https://mapsplatform.google.com/pricing/?_gl=1*b46l22*_ga*Nzc5NzEzNTg0LjE3NDg4Nzg0NTQ.*_ga_NRWSTWS78N*czE3NDg5NTEzODMkbzIkZzEkdDE3NDg5NTE0NTAkajYwJGwwJGgw
