If you buy a domain through Shopify, your domain will automatically be configured to work with your primary domain. Usually, your primary domain has the format ‘***.myshopify.com’ when you sign up for Shopify. If you want to change the domain that’s displayed to customers while they browse your online store, then you can add a custom URL, such as www.****.com.
Alternatively, if you already own a custom domain from a third-party provider, then you can use a domain that you already own. You can either connect your custom domain to your online store or have the option to transfer management of the domain to Shopify.