If you want to use a custom domain name (perhaps you already have your own domain) then you will need to purchase one of the premium plans. As a rule, the most basic paid plan for each free web creator will allow you, among other things, to use your custom domain name. In addition, Wix has a separate option – Connect Domain, which allows you to add your custom domain at a price half that of the base premium plan. But at the same time, this option does not remove Wix brand ads.
I should highlight here that, much like all website builders, SITE123 is not without cons. It’s a simple and intuitive website builder, but it is more suited to building basic websites. If you use only the free options, you won’t be able to create anything but a simple personal website with SITE123. Meanwhile, its free plan has no duration constraints, but limits storage space to 500MB and bandwidth to 1GB.
How To Make A Free Website - Wix Tutorial