What role do the witches play in Macbeth?

in
represent the influence of supernatural forces on human affairs.They are
depicted as malicious within the play, and their activities are simultaneously tied up withof
destiny as well as of corruption.They serve as enablers to, and in this capacity, they play a
role in shaping his murderous rise to power (and also in his eventual downfall).With that in
mind, they have a critical role within the play, if not an active one: they take little decisive
action on their own terms (in contract to a character such as Macbeth), but their manipulation
and influence...