Existing products can be updated only if they were imported from this app. By this way, this app allows you to have stock synchronization if you have products in different stores.If you have a link from a provider on products, you will need this app for a faster and automated process. Also, the app allows importing files from a computer.*Tip: If you need to import only once without update, you can subscribe for one month, which gives the permission to import products and collections.