A governor is a leader of some kind. In some countries, the governor is the leader of a state or a province. For instance, in the United States of America, each of the 50 states has a governor elected by its own people. The governor is the executive for the state's administrative processes.
In Australia and Canada a governor represents the monarch in ceremonies. In many countries such as Pakistan a provincial governor is appointed by the central government acting as the ceremonial head of the provinces.