The Magento bpost plugin uses Google Maps API to display the map in the frontend. Please note that this is optional if you will not meet the usage limits. Visit Google’s online documentation for more information.
-> It is advised to setup a browser api key if the google maps usage limits
will be reached, not providing a Google Browser API key can make the bpost
module not function properly
The Magento bpost plugin uses Google Geocoding API to calculate GEO location based on the shipping address. Please note that this is optional if you will not meet the usage limits. Visit Google’s online documentation for more information.
-> This is the part that converts the location to an address using the
Google Maps Geocode api, if you do not want to hit usage limits it is advised
to provide the bpost module with a Google Server API key
What are the standard usage limits ?
>> response here
How can I get a Google API Key ?
>> response here