Location of GeoIP City binary data file. This file is not part of Moodle distribution and must be obtained separately from <a href="https://www.maxmind.com/">MaxMind</a>. You can either buy a commercial version or use the free version. You'll need to register to download the City database file, which you can do at <a href="https://dev.maxmind.com/geoip/geoip2/geolite2/" >https://dev.maxmind.com/geoip/geoip2/geolite2/</a>. Once you've registered and downloaded the file, extract it into "{$a}" directory on your server.