A domain name is what customers will search to find your shop. It Is important to make sure your domain name is both relevant to what you are selling, but also catchy and easy to remember.
Although you must have one primary domain linked to your shop (which will show on the top URL bar as shown above), you can have more than one domain linked to your account so that people can access you shop through multiple different names.
[more]For help registering a domain name or for more information, click here.[/more]