What does Hecate want the witches to do?
the question comes out of act 3
Hecate is indeed angry, for the witches have "trade[d] and traffic[ed]" with Macbeth without including her. She considers him a "wayward son", self-serving and ungrateful. She wants the other witches to "make amends"--that is, to set things right. They are to work with her to set Macbeth up for failure, using his own hubris and his weak humanity against him. Hecate knows that humans, being mortal, crave security; therefore, she wants the witches help her manipulate Macbeth's emotions. She wants him to "spurn fate" and "scorn death", and, ultimately, place his own hopes above "wisdom, grace and fear." Which means she wants them to help her trick him into a false sense of security so that he will then make the fool-hardy mistakes that will bring about his undoing.
Hecate is upset because the other Witches did not consul her before they spoke to Macbeth. Hecate assures them she will conjure a spell that will lead Macbeth to a disastrous fate. She sends them to cast the spell and prepare the charm, as Macbeth plans to visit them soon.
Hecate, the goddess of witchcraft was furious with the witches and scolded them for meddling with the business of Macbeth's usurp of the kingdom without consulting anything from her, and say that she would take over as superintendent over the mischief. She say that she would conjured up visions and spirits who would spread messages and false stories that would give him a lack of secrecy and security, and caught him unguarded, making him bewildered and confused, turning his life into a disastrous madness.