Why is the clock on the stage important to the action in a Christmas carol?

The clock on the stage in "A Christmas Carol" symbolizes time passing and serves as a reminder to Scrooge of his mortality. It heightens the sense of urgency for Scrooge to reflect on his past, present, and future, prompting his transformation throughout the story. The striking of the clock also underscores key moments in the narrative, emphasizing the fleeting nature of time.