If you have a funnel set up you can set your frontend product as the main product and if you have multiple single offers, you can set any one of the products as the main product.
When a product is set as a Main Product, there is no need to separately mention the product ID in its affiliate link, it shortens the affiliate link and remove the confusion of product ID.
Once you set a product as your main product, the affiliate link for that product will look like this:
sellerID is the seller account
affiliateID is the affiliate account
A Product can be set as a Main Product by clicking on "Action" and then selecting "Set as Main Product" in the Products section of your seller account.
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