Cleaning removes unwanted substances from surfaces to maintain hygiene, appearance, and cleanliness. It involves using cleaning agents, tools and techniques to eliminate dirt from floors, countertops, furniture, windows and appliances through activities like sweeping, mopping, vacuuming, dusting, wiping and scrubbing. Regular cleaning is important to prevent the buildup of allergens, bacteria and pathogens that can harm health. It also helps maintain surfaces and prolong the life of belongings.