If you happen to have Shopping Cart Creator Pro, you will still find some helpful articles if you navigate to Support on the main navbar, and then look for Articles. You can search for Shopping Cart. But be aware that Shopping Cart was created before responsive web design came about.
If you don't have it, I'd say a storefront is just like any website's front page, with pictures and short descriptions that tell people what they sell, then links to the items, or to the item category, for more details. You probably need one or two things that you promote, with 'before' and 'now' prices.
Ha en riktig god dag!
This site was made before we were able to create components through the app:
Component sharing for RFF, RBB, RSD and SD: https://eikweb.com/sharing/
My work in progress right now:
Components for the same as above + HTML Editor: https://mock-up.coffeecup.com