Trade includes both finished goods & labour.
Canada is one of the larger countries on planet Earth & sits in N. America immediately North of the larger (population) United States of America. Canada is divided among ten provinces & three territories which account for internal trade.
There are impediments to free trade within Canada which were partly removed in a 1994 agreement & further discussion is under way toward a totality of internal free trade.
Associated with internal trade it must be noted that external trade benefits greatly when there is internal free trade.