Lubricants are substances used to reduce friction between surfaces in mutual contact, which helps to prevent wear and tear. They can be found in various forms, including oils, greases, and gels, and are commonly used in machinery, vehicles, and even personal care products. The primary function of lubricants is to create a smooth surface for movement, enhancing efficiency and prolonging the life of equipment. There are different types of lubricants, such as synthetic lubricants, which are chemically engineered for specific applications, and natural lubricants, derived from organic sources. Each type has unique properties that make it suitable for particular uses, such as high-temperature environments or water resistance. Proper lubrication is essential for maintaining the performance and reliability of many systems.