Changing the domain name is simple. But the main thing to be focused on is that when changing the domain name, you also need to change the marketplace website’s URL.
Therefore, before changing the domain name, you must be cautious about this URL change and handle it properly.
To change the domain name,
Login as admin.
Select the “Setting Icon” placed before the admin's profile option.
Find the “Domain” section in the general category, and click it.
There you can see the input tab with your current site URL.
Now edit it to whatever domain name you want.
Hit the Save button.
Now you’ll navigate to the updated Site URL. You have to log in again to access the updated marketplace website.