Why did people come to the chronicler in the Middle Ages?

A chronicler in the Middle Ages is a historian who studies historical events and genealogies. In general, he knew the history of many processes. Noble people came to him in order to build their family tree, find out their ancestors, and find out their kinship. He was contacted in order to learn local history. The person in this position not only studied the old days, but also compiled new written evidence of the events taking place. He studied the sequential course of history and created works related to it.