Core competency

A term used to describe all those resources and capabilities that a particular company is able to utilize in a more efficient manner than its competitors. In reality core competency makes up the essence of business.
Core competency has three characteristics:
(1) It is a source of competitive advantage in that it makes a significant contribution to perceive customer benefits,
(2) It has a breadth of application to a wide variety of markets, and
(3) It is difficult for competitors to imitate.