Coaching refers to a method of knowledge distribution with the objective of deepening learning and improving performance. The coach is usually not an employee of the organization but an outside consultant
Other /More definition:
Coaching is a method of training in which a new employee receives on-the-job guidance from anexperienced employee.
Moreover, Coaching refers to the method of social-skills training in which an adult displays and explains various socially skilled behaviors, allows the child to practice them, and provides feedback aimed at improving the child’s performances
List of books: Coaching