5S is a methodology for organizing, cleaning, developing, and sustaining a productive work environment. It consists of 5 steps: 1) Seiri (Clearing up, sorting), 2) Seiton (Organizing), 3) Seiso (Cleaning), 4) Seiketsu (Standardizing), and 5) Shitsuke (Training and discipline). The document provides details on implementing each step of 5S, which includes identifying needed and unneeded items, designating storage areas, developing cleaning schedules, standardizing processes, and continuously improving through monitoring and training.