The document discusses the concepts of training, its aims, roles, need and importance. It describes that the aim of training is to develop the skills and knowledge of trainees to perform tasks efficiently. Training is a learning process that involves acquiring new skills and applying them in practice. It increases employee efficiency, morale and organizational viability. Rapid technological changes and need for career advancement make training necessary. The document also discusses different learning principles, types, methods, requisites and pitfalls of effective training.