The WHO Optimize MNH guidance contains evidence-based recommendations for the safe provision of key maternal and newborn health interventions by different cadres of health workers. This document summarizes the WHO recommendations on the cadres ranging from lay health workers to mid-level providers that may be trained and supported to provide the following contraceptive methods safely: tubal ligation, vasectomy, intrauterine device (IUD), implants, injectables, as well as promotional activities. The process of enabling additional cadres to provide a specific health intervention is referred to here as ‘task shifting’ but is also widely known as ‘task sharing’.