5S is a philosophy and methodology for organizing and managing workspaces using a five-step process: Sort, Set in Order, Shine, Standardize, and Sustain. The 5S approach aims to improve efficiency and reduce waste by eliminating unnecessary items, properly storing and labeling necessary items, cleaning and maintaining a clean work environment, standardizing processes, and sustaining the new systems. Implementing 5S creates a more organized and efficient work environment that supports continuous improvement efforts.