What is the purpose of stage directions?

Stage directions serve many functions, but their primary purpose is to guide actors' movements on the stage, called blocking. These notations in the script, written by the playwright and set aside with brackets, tell the actors where to sit, stand, move about, enter, and exit.

he will find out what went wrong or happened and how.

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.