A Domain Registrar is a company that manages the reservation of internet domain names. When you want to create a website, you need a unique domain name, and a registrar helps you register that name for a specific period. They ensure that the domain name is available and then facilitate the purchase and management of that name. These registrars are accredited by organizations like the Internet Corporation for Assigned Names and Numbers (ICANN). They provide services such as domain name registration, renewal, and transfer, as well as additional features like web hosting and email services.