What is the purpose of England national football C team?

I read a football magazine a few years ago and there was an article about England national football C team. According to Wikipedia, this team represents England at non-league level.

As far as I know, a national football team was formed to represent the country in international competitions like World Cup and in the case of England, Euro or Nations League. Since it has been represented by the senior national football team, what is the purpose of the England C team?