What are the purposes of a prologue in a play?

To open/set up the story, establish the setting/s, tells some earlier details, and  connect them to the main story.

Explanation:

i used to know but i learned it a long time ago sorry

explanation:

b. and i with my fighting heart, i thought at

first / to steal up to him [the cyclops].   the cyclops’ actions first odysseus to take

action after killing his men and trapping in the cave revealed his intent of

doing them harm.   that is why odysseus

blinded him to enable him and his men to escape.