Pages allow you to display product listings, tell your store's story, make refund and shipping policies clear, and provide any other information that you can't fit in your product descriptions!
To add a page, go to Pages > Custom in the Design Panel in your storefront. Enter your page's title, create a custom URL, then select which Layout this page should live within. Click Save Page when you are finished making changes.
This new page can be accessed at the bottom of your Custom page list in the design panel now.