Shopify has a number of channels for you to sell your products. These are called sales channels. You can use one or more sales channels to sell. Each place where you are selling is like a channel that flows into your business, helping customers from a variety of audiences find your products. Connecting all of these sales channels to Shopify makes it easy for you to keep track of your products, customers, orders and inventories in one place, no matter which sales channel you're using.
Sales channels that you add are listed under Sales Channels on your Shopify admin panel.
Shopify also allows you to sell in person using the Shopify POS app, credit card reader and other hardware.
Facebook : You can post and sell your products directly from the Shop tab on your store's Facebook page.
Mobile Apps : You can use this to build your own iOS App. Customers can make purchases using their Credit Card or Apple Pay.
You might need to change your store's settings before adding a sales channel because of specific eligibility requirements. If your store isn't eligible for a sales channel, then the channel appears as Unavailable in your Shopify admin. Click View details to see why your store isn't eligible.