What were Aristotle's classic unities of time action and place?

Aristotle's classic unities, as outlined in his work "Poetics," refer to the principles that govern dramatic structure in literature, particularly in tragedy. The unity of time suggests that the action of a play should occur within a single day, emphasizing the immediacy and intensity of events. The unity of action stipulates that a play should focus on a single main plot without subplots, creating a coherent narrative. Lastly, the unity of place calls for the setting to remain consistent, ideally confined to one location, to maintain the play's focus and believability.