Question

What are the purposes of a prologue in a play?
to provide information about the inner thoughts and feelings of a character
to set the mood and tone of the play and provide background information
to provide information about how the stage should be set and what props are needed
to give some insight into the relationships among different characters
to provide a hint to the audience about what will happen later in the play

Answer 1

can you explain a little more

Answer 2

it is meant to give a feel of what happens or what will happen during the movie or as you said a play