it is used to repair damage caused by the Jinn possession or the evil eye. Jinn is the one whose meaning is to hide or to be concealed still if they get after us, they can make our life a living hell. There are many reasons why a house gets possessed by the jinns or the evil. Either you have caused harm to them without even knowing and now, they are simply taking revenge. its also used protection against black magic sihr which is done by anybody on you.