Can somebody please tell me what the role of the Nurse is in Euripides's Medea?

The Nurse's role in is to bring the audience into the world of
the play. In theof the play, she gives the historical background, provides commentary on these
events, and introduces the major characters: Medea and Jason.

At the end of
the Nurse's opening , the Attendant enters and tells the Nurse about the rumors being spread
about Medea and Jason, providing additional background for the play.

Theenters, and with the voice of Medea lamenting her current woeful situation in the
background, the Nurse discusses Medea's tumultuous emotional state of mind and physical decline
with the Chorus.

By the time the Nurse leaves the stage, never to return,
she's served her purpose (her role), which is to give the audience the information they need to
understand the rest of the play.

The audience never actually sees the Nurse
in her role as "nurse" to Medea. The Nurse and Medea have no scenes together. The
Nurse makes only passing reference to her "princess" and her
"mistress,"...