Once you’ve decided on your top choices for your site name, make sure you are not violating anyone’s trademarks. To check within US, visit uspto.gov/trademarks and do the search before you register the name. It is always good to check now because this could kill a great website and business down the road. Also, if you are going to include some big name product, such as Twitter or Facebook, review their terms and conditions. Most will not allow you to use their name in any part of your domain.
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.
Thanks for the comment. Yes, it is – people are always happy to get something for free. It’s right. But you need to understand that for free you always have to pay. Often not money, somehow differently, but have to. In the case of free website builders, such a fee is the availability of brand ads on the website. And in my opinion this is not a very high fee for a completely free website.
A handful of domains will have restrictions on them, which means you can only purchase them if you meet or exceed certain criteria or have authorization (some examples are .gov, .edu and .mil). But most extensions are available to everyone. In fact, most country code Top Level Domains ccTLDs are available for anyone to purchase, even if you don't reside in the country code in question.
Namecheap helps you to find your business’ domain name with a generator called Beast Mode. First, start by entering up to 5000 domains or keywords. Then, select what kind of TLDs you want to include in your search. You can either add your preferences by category or select all TLDs available. Beast Mode also has many filters to narrow your search results, like: Should Your Domain Name Contain Keywords to Boost SEO Rankings?