Re: Google map user manual ?
Once you have the api key in there Google maps is generated based on the address you put in the "location" field. If the adddress is invalid or blank, the map will not appear for the ad.
To test, enter a known simple location like San Francisco, CA on one of your test ads. If it comes up, then you've got Google maps working ok.
Note, you will need a separate special api key if you are testing on your local environment.