can someone explain wix com?

you need a paid plan to connect your own domain and drop the wix branding, so compare the yearly price on that tier, not the free one. seo-wise it's fine for a small site these days - the bad reputation is from years ago.

Hosted site builder - you drag blocks around in the browser and they do the hosting. Fine for a typical small business site. The catch is you cannot export it, so moving to another host later means rebuilding.