A domain name is a unique address used to identify a website on the internet. It is what users type into their web browsers to access a specific website, such as google.com or facebook.com. Instead of remembering long strings of numbers (IP addresses), domain names provide a user-friendly way to navigate the web. Registering a Domain Name. To register a domain, you need to choose a unique domain name.Use a domain registrar (e.g., Namecheap, GoDaddy, Google Domains). Pay a yearly fee to maintain ownership. Link the domain to a web hosting service.