Training can be defined any or all of providing assistance in learning, coaching, teaching, or developing in oneself or others any skills and knowledge that relate to specific useful competencies.

Training usually has specific goals of improving one's capability, capacity, productivity and performance. In addition to the basic training required for a trade, occupation or profession, observers of the mass-market recognize the need to continue training beyond initial qualifications: to maintain, upgrade and update skills throughout working life. People within many professions and occupations may refer to this sort of training as professional development.