This assignment delves into the significance of training and development in enhancing employee performance, job satisfaction, loyalty, and productivity across different sectors. It reviews numerous research papers, articles, and journals to provide a thorough understanding of the impact of training on employees. The study also examines the role of customer service, product quality, and personal interaction quality in influencing customer satisfaction and loyalty. Furthermore, it discusses the importance of employee training and development in Nigerian organizations and its potential for future research. A case study is presented on the impact of training and development on employee performance and productivity at United Bank Limited Peshawar City, KPK, Pakistan.