You must insert a valing billing account (use your credit card or a virtual card). Don't worry, you will not pay nothing, never.
After you successfully added your billing account you will get the key.
Insert the key by replace the string [YOUR-KEY] of the installation script with your key.
You must insert the key into Apparence > Theme options > Social and API > Google API key. From September, 2018 Google require to connect the Google Account to a payment method like your credit card, it's mandatory but in most of cases you will not pay nothing, you will pay only if your website have a very large amount of daily visitors.
Map coordinatesLongitude and latitude coordinates. You can get it from www.gps-coordinates.net. Coordinates are the recommended method due address method is slower and less mirated.
Map heightHeight of the map in px.
Map addressAddress of the map with format address, city, country. This method is not recommended, use coordinates instead.
Map zoomZoom level.
Marker imageMarker image in PNG.
Marker positionMarker position related to the map.
Marker top offsetMarker position adjustment.
Marker left offsetMarker position adjustment.
Map skinMap skin is the design of the map, check HTML documentation for custom skins.
TriggerManual trigger is required if the map is inserted into a Lightbox, a two sides template or other.