Why is Ophelia’s “O, my lord” monologue in Shakespeare’s Hamlet good and what does it show?

Why is Ophelia’s “O, my lord” monologue in Shakespeare’s Hamlet good and what does it show?
Why is Ophelia’s “O, my lord” monologue in Shakespeare’s Hamlet good and what does it show?

Why is Ophelia’s “O, my lord” monologue in Shakespeare’s Hamlet good and what does it show?