The narrator interrupts the story to comment, judge, give an opinion or speak directly to the reader.
In Crime and Punishment
but here a new story already begins, the story of a man's gradual renewal, the story of his gradual rebirth, of his gradual passage from one world to another, of his acquaintance with a new reality, until now entirely unknown. That could form the subject of a new account, but our present account is over
The narrator interrupts the story to comment on what is to come and to declare the account “over.” The voice comes from within the narrative and speaks to the reader about the limits of what it has told.