A domain is the URL or website address where your customers go to find your store online. You manage your domain settings for your online store on the Domains page in your Shopify admin. If you use the Wholesale channel, then you manage the domain settings for your wholesale store in the Domains section in the Wholesale channel.
Your primary domain is the domain that's displayed when customers' visit your online store. If you're on the Shopify plan or higher and use international domains, then a different domain might be displayed depending on where your customers are located and how you've set up your international domains.
By default, your primary domain is your myshopify domain. Myshopify domains use the format
your-store-name.myshopify.com. You use your myshopify domain to log in to your store and identify your account when you contact Shopify Support.