Every time someone on your Ecommerce store registers an account or submits their email address for your newsletter, a Customer is created. You can use the Shopify admin interface to update customer name or address and add notes about the customer.
Shopify allows you to sell through multiple sales channels. (PoS, Online Store, Facebook, Instagram, Amazon, and more.) Your Online Store sales channel is your Ecommerce store. You can use these settings to edit the look and feel of your website, including colours, fonts, and how your store navigation is organized.