Change Domain from test to Live


I set up a domain for a client. Now the client is happy with the website and wants to go live. Is it possible to simply change the domain, or do I need to create a new website for the live domain?

test website is domain:
live website domain would be:

It is a WordPress website.


Easiest way is use migration plugin.


You have to migrate the test site to the main site if it is a wp site use any plugin