A product is considered as complete when we have enough information to export this product to a channel.
The definition of completeness can vary :
From a family to another : a TV will not require the same kind of data than a book or a shirt
From a locale to another : you can have a complete product for your English catalog but still in a translation process for a Spanish one.
From a channel to another : maybe our wesbite doesn’t need the same amount of data as our catalog