A domain name and a website are two separate things: the domain name is the address, and the website is the content on it. Many people conflate these two things when building a site, and as a result, they end up repeatedly struggling when changing servers or adjusting the structure. Look at them separately, and the process becomes clear.
How a domain name points to a website
After a user enters a domain name in the browser, the system uses DNS resolution to find the server address corresponding to that domain name, then retrieves the content from the server and displays it. The domain name and the server are separate, so when changing servers, you only need to modify the resolution configuration; you do not need to register the domain name again. This is also why a domain name deserves separate attention.
Registration and ownership
Registering a domain name gives you the right to use a specific character combination, not permanent ownership. After registration, you need to complete real-name verification and properly safeguard administrative control. A common hidden risk for enterprises is that a domain name is registered under the name of an employee who has left. When personnel changes occur, the handover is unclear, causing the domain name to fall out of control. The cost of recovering such issues is very high.
The basic process for going live
The order is roughly as follows: determine the domain name, prepare the server and deployment environment, configure DNS records to point the domain name to the server, configure a security certificate to enable encrypted access, and finally test whether access works properly in all locations. Each step is not complicated, but the order cannot be reversed.
A few common questions
After a DNS change, it does not take effect immediately and requires waiting for a period of time. This is normal; a security certificate has an expiration date, and expiration will cause access interruptions, so it is best to set an expiration reminder; if multiple subdomains are used at the same time, one wildcard certificate can cover them, reducing management burden.
Understand domain names and websites separately, and there will be much less back-and-forth when building a site.