Without a domain, the site is available only on a local server, that is, it works in offline mode. If you want Internet users to access it, you need to register a domain name (site address) and purchase hosting (where data will be stored). The creation of any site begins with this. After registration and payment, it will be available online and other users will be able to access it.
It is recommended to use this procedure with maximum benefit. When you are going to buy a domain, come up with an original name that will attract the attention of users and, perhaps, become a well-known brand in the future. When registering, be sure to provide valid personal data so that you can prove that you are the owner of a specific domain.