Since historic times foreign trade been the main channel connecting countries, e.g. silk route connects India and South Asia to markets both in the East and West.
Foreign trade creates an opportunity for the producers to reach beyond the domestic market. They can sell their produce not only in domestic market but can also compete in market of other countries.
For the buyers, import of goods produced in another country provided opportunity to extend their choice of goods beyond what is domestically produced.
Foreign trade thus, results in connoting the markets in different countries.