In the given passage, the Pardoner is characterized as a kind of scammer, but in any case effective.
The narrator speaks of him as if he were a new person who came to the city to get money from everybody around the town by making tricks and talks with double intentions.
He not only deceive people, but also priests.
Despite his way of being, the author states that he was a great ecclesiastical anyway.
we don't know what poem you are referring to