What was the witch in ancient Korea? What's the situation?

It is said in "Holding the Sun in the Moon" that witches are mainly used to exorcise evil spirits for the king, that is, to pass on the evil spirits of the king to themselves, so as to seek the peace of the king and to perform divination and fortune telling. . . . .

Witches are so humble that everyone dares not avoid them, which is considered an ominous sign. Can't get married, and some don't even have names.