The document discusses high level cleaning, which refers to cleaning surfaces at elevated heights, such as windows, walls, ceilings, and roofs of buildings. It involves both internal cleaning of areas like offices and common areas, as well as external cleaning of walls and windows. High level cleaning is important for maintaining cleanliness in various business settings like hospitals, offices, malls, and public areas. Proper personal protective equipment and safety procedures should be followed to prevent risks when working at heights.