What is the primary function of a domain registrar?

The primary function of a domain registrar is to manage the reservation of Internet domain names. Domain registrars are organizations accredited by a domain name authority (such as ICANN) to facilitate the registration and management of domain names. When individuals or businesses want to establish their online presence, they typically go to a domain registrar to check the availability of a desired domain name and register it for a specified period.

These registrars handle the database that allows people to search for, purchase, and renew domain names. They ensure that the ownership of the domain name is properly recorded in the global DNS (Domain Name System) so that when someone types in a domain name, it can resolve to the correct website. This service is crucial for establishing a unique online identity, which is why the first option accurately reflects the main purpose of a domain registrar.