The Domain Name System (DNS) is coordinated at the global level by an organisation called ICANN - the Internet Corporation for Assigned Names and Numbers.
ICANN brings together people and organisations interested in the DNS to make global policies that have an impact on the generic Top Level Domains (think names ending in .com or .red). These policies might have a future impact on how we operate .nz for New Zealand.
Registries that run domains, registrars that sell them to the public, businesses that use the Internet, civil society activists, governments - all get together at ICANN's meetings, which move around the world three times a year. Besides shaping policy, it's the best chance to meet with other organisations, that like us, run ccTLDs (country code top level domains). We find out how they are developing and we share best practice with each other.