Pressure is the force that is exerted on a surface, and it is measured in units such as pascals or pounds per square inch. It is an important concept in science and engineering, as it helps us understand how different systems and machines work. Pressure can be created by various factors, such as fluids, gases, and solids, and it plays a role in many physical phenomena. Understanding pressure is essential in designing and operating systems and devices that use it, from tires on a car to airplanes and rockets.