A cleaner's job description involves performing routine and specialized cleaning tasks, such as sweeping, mopping, and dusting, to maintain the cleanliness, hygiene, and presentability of various spaces like offices, homes, and commercial buildings. Key responsibilities include sanitizing restrooms and kitchens, emptying trash, replenishing supplies, and ensuring adherence to health and safety protocols. Cleaners may also be responsible for light maintenance, reporting damage, and operating cleaning equipment safely.