The Exhorter

How would you describe an "exhorter"?  Here is one definition.  I am looking for others.  Input, anyone?

EXHORTER: That special ability to find and communicate to others practical ways of serving God. The exhorter is a positive motivator, knowing practical Christianity will change the lives of others (Rom. 12:8; I Timothy. 4:13; Heb. 10:25).