When Marley visited why did the bell ring?

In Charles Dickens' "A Christmas Carol," the bell rings to signify the arrival of Jacob Marley's ghost. It serves as a supernatural signal of his presence and the impending visitations that Ebenezer Scrooge will experience. The ringing of the bell is a harbinger of change, marking the beginning of Scrooge's journey towards redemption. This moment encapsulates the theme of the supernatural intervening in the lives of the living.