The neural crest is a group of cells that forms during the development of vertebrate embryos. These cells originate from the ectoderm, the outer layer of the embryo, and migrate to various parts of the body, where they differentiate into diverse cell types. Neural crest cells contribute to the formation of several important structures, including neurons, glial cells, and pigment cells. They play a crucial role in developing the peripheral nervous system and facial structures, making them essential for proper embryonic development and the formation of various tissues.