What is the apparent purpose of this brief scene act 4 scene 4 hamlet?

In Act 4, Scene 4 of Shakespeare's "Hamlet," the apparent purpose is to highlight Hamlet's internal struggle and contemplation of action versus inaction. Encountering the Captain from Fortinbras's army, Hamlet reflects on the determination and honor of Fortinbras, who is willing to fight for a trivial piece of land. This moment serves as a catalyst for Hamlet's self-criticism, prompting him to reevaluate his own hesitance in avenging his father's murder. Ultimately, it underscores the theme of ambition and the contrast between Hamlet's philosophical indecision and the resolute actions of others.