Whats is commercial revolution ?

The Commercial Revolution was a period of European economic expansion, colonialism, and mercantilism which lasted from approximately the 13th century until the early 18th century. 

A commercial revolution was a period in which European economic expansion, Colonist, and mercantilism which lasted from approximately the 13 century until the early 18th century.  It was succeeded to the mid 18th by the Industrial revolution.