Who is Taleswapper from Red Prophet and what is their importance?

Taleswapper travels light. He carries a change of clothes, bits of food and a book. The front third of the book contained single sentences written by people that summed up the most important thing they had ever seen in their lives. The last two thirds are bound and contain stories that Taleswapper wrote about things that had happened, that he believed were important and true. He has white hair where he isn't already bald. He wears a hat, and carries little more than his pouch as he travels.