To import products,
navigate to the Marketplace tab in your Crowdship app
select the products you want to import from the list
and click "Add to my store"
It takes a few seconds for each product to be imported into your Shopify store, so please give it a bit for the import to complete (depending on how many products you selected, it could take a few seconds to a few minutes).
You can leave this page, or refresh it, the import will complete in the background.
Once the products have been imported into your Shopify, you will see them in your Shopify >> Products list, and they will also show up on the Inventory page in Crowdship.