A domain name is a unique address that identifies a website on the internet. It acts like a street address for your online presence, making it easier for people to find you. For example, in the domain name www.example.com, "example" is the name of the website, and ".com" indicates that it is a commercial site. When you want to create a website, you need to register a domain name through a domain registrar. This process ensures that no one else can use your chosen name. Once registered, you can build your site and share it with the world!