An LMS (Learning Management System) is a platform that handles all aspects of learning like administration, tracking, and delivery of training programs. It allows companies to manage online training and courses in a centralized system. Key benefits of an LMS include lower costs, easier administration and tracking of learning, 24/7 access to training, and ensuring regulatory compliance. Using an LMS can save companies significantly over traditional training methods, with an example provided showing a potential cost savings of 75%.