Who is The Gods (Zeus, Artemis, Apollo, Athena) from The Oresteia and what is their importance?

Religious (spiritual) beliefs were a central part of life and art in Ancient Greece. The major gods represented the powerful forces of nature and human experience, whereas, the minor gods represented things like the rainbow, individual streams, or a type of flower.

Several gods are mentioned in The Oresteia, but only four have a direct impact on the action. The first two never actually appear. Zeus, the king of the gods, is evoked several times as the ultimate power and the source of ultimate justice. Artemis, the goddess of the hunt and of the moon, was the goddess to whom Agamemnon sacrificed his daughter. Apollo, god of the sun and music and prophecy, is mentioned by Orestes in Libation Bearers and appears in Eumenides, as the god who ultimately guides and supports him in his acts of vengeance. Finally, Athena, goddess of wisdom and war, appears in Eumenides as the ultimate arbiter of justice, casting the final vote in favor of Orestes.