1) The document provides background information on William Shakespeare's play Othello, including when it was written and first performed, as well as the setting of Venice, Italy in the 16th century.
2) It introduces the main characters of Othello, a respected general and Moor, and his wife Desdemona, the daughter of Venetian senator Brabantio.
3) The document explains that various characters are upset for different reasons - Brabantio because his daughter married without his consent and a Moor, Roderigo because Desdemona married Othello instead of him, and Iago because Othello passed him over for a promotion.