A feed shows shoppers an endless stream of products whose order changes over time. It's useful for a browsing page where returning visitors should see different products each time.
A market sells the same catalog in a different place with different rules. Use one when you sell in another country or currency, or through another channel such as a marketplace or a wholesale shop.
Pages are the parts of the storefront you write yourself, such as the home page, a landing page for a sale or an about page. Each page has its own text and an optional product feed with filters under that text. This section explains how to create a page, what it shows on the storefront and how to change its address safely.
Settings is where you describe your store as a whole, including its name, its legal details and the currencies it uses. Fill in the Store page first, and use the settings sidebar to reach every other settings page.
The help center covers every screen and setting.