DriverSide's Car Dictionary has the most comprehensive definitions of automotive terms. This auto glossary can help you decipher what your mechanic is fixing and what the purpose or function of the particular auto part or accessory is for. We have taken the mystery out of automotive service jargon, so that you don't have to.
Along with the suspension spring, the shock (many manufacturers such as BMW and Toyota often use a MacPherson strut design that has the same function) and suspension arms and links, the shock is one of the major components of a vehicles suspension. Its basic function is to control the spring. which would otherwise bounce your vehicle like a pogo-stick after bumps. Shocks are definitely "wear" items, and should be replaced per your manufacturer's recommendations. If you notice your car's ride a bit bouncy, consider new shocks all around.