The meaning of conditioned and unconditioned reflexes?

Conditioned and unconditioned reflexes are necessary to ensure the vital activity of humans and many other animals. They are needed immediately after birth. The breathing and sucking reflex is essential for life. These are one of the unconditioned reflexes. Conditioned reflexes appear later with the acquisition of some experience from a person. So we can save ourselves from various damages. For example, reflexive head covering and tilting at the sight of a flying object or an explosion. Also, the usual withdrawal of the hand from a hot one is a conditioned reflex.