The word manufacture means to process a raw material into a useful item. Your aim here is to describe your product’s development from the stage you receive it at, to its finished form. This may involve a complete manufacturing process all the way from harvesting trees to producing paper towels. And then again, you may be only printing a psychedelic design on the paper towels. If certain stages in your product’s manufacturing are contracted out, explain these as well.
Have a look at these questions before you get started: