A lubricant is a substance used to reduce friction between surfaces in mutual contact, which ultimately helps to prevent wear and tear. Common types of lubricants include oils, greases, and gels, and they can be made from various materials, such as petroleum or synthetic compounds. Lubricants are essential in many applications, including machinery, automotive engines, and even personal care products. In addition to reducing friction, lubricants can also help to cool surfaces, protect against corrosion, and seal out contaminants. They are widely used in industries like automotive, manufacturing, and healthcare, ensuring that equipment operates smoothly and efficiently while extending its lifespan.