What term is used to describe the process of helping a new employee to settle quickly into their jobs so they become efficient and productive workers?

The term used to describe this process is "onboarding." Onboarding involves integrating new employees into an organization by providing them with the necessary training, resources, and support to help them acclimate to their roles and the company culture, ultimately enhancing their efficiency and productivity. Effective onboarding can significantly improve employee retention and job satisfaction.