What was act three in A Christmas Carol Scrooge and Marley about?

The story is not in acts but in Staves. In Stave three, Scrooge encounters the Ghost of Christmas Present. The Ghost takes him through the "Christmas" or year that is current up to that very Christmas Eve and shows him lives of those he touch upon through that year but also brought about a wanting regarding Need and Ignorance of mankind and the outcome for everyone if these issues were not faced.