What Is Quantity While Connecting Product With Shopify?

Hi, I am trying to send my orders from Funnelish to shopify. And for that I integrated the Shopify with Funnelish. And while in my funnel when I am creating automation for my product with shopify I saw a option of Quantity or QTY. Can you explain me what is this for?

Can I use it to make bundles? Suppose that if I am selling a shirt in bundles of 3 and 5. So I created 2 products for that. May I add QTY here to 3 for first products and 5 for second one?