Mapname is the unique name assigned to anywhere you like, your id is your prefix. Once a mapname created then this can be used as an address. A mapname can be viewed in your favorite maps Google Maps, Apple Maps, Yandex Maps, Bing Maps, Baidu Maps, Open Street Maps or with what3words, citymapper, waze.
Your map.names starts with your prefix and unique to you. You may also organize collection of places with just two words, for example; coffee shops i like at NY is abc.1 or I have visited Melbourne last year where you can see at abc.melbourne. You may also pin map.names to your boards which contains any map.name