Using a third-party domain
If you already own a domain from a third-party provider, such as GoDaddy or Bluehost, you can use it for your Shopify online store so people who type your URL into their browsers end up on your site. You can use your third-party domain for your Shopify store by transferring it to Shopify or by connecting it to Shopify:
Transfer your domain to Shopify - The first way to point your custom domain at your Shopify store is to transfer your domain. Most domains can be transferred to Shopify. When you transfer a domain, management of the domain moves to Shopify, meaning you adjust your domain settings, pay for your domain, and renew your domain directly in your Shopify admin. If you want to use your third-party domain with Shopify in this way, then refer to Transferring domains.
Connect your domain to Shopify - Connecting your third-party domain to Shopify points your domain name at your Shopify store. You still use the third-party domain provider to manage your domain settings, pay for your domain, and renew it. If you want to connect your domain to Shopify in this way, then refer to Connecting existing domains
Learn more about how domains can affect your sender email address and Shopify Email.