Storefronts are lists of URLs which will be parsed. You can add data from them to posts.
Just open URL of the original product and copy URL.
You can find all supported shops in "Deeplink” tab.
You can add 3 types of URLs:
URL of a single product,
URL of a category or other archives of a shop,
URL of an image.
In second case, the plugin will parse all products from the archive page. Use special syntax, for example:
limit=10 shows how many products the plugin will parse from URL of the archive.
You can mix different URLs from different shops and archives in one storefront to make comparison lists.
For the single image parsing, use such syntax:
[img title=”Super product"]http://supershop.com/image.png