Answer:
Acceptance and support of extensive new government policies and actions in the economy and war.
Explanation:
The other answer given is more technical. My answer attempts to get more at the GOAL of the method.
The "familiarity" was not the desired outcome of the chats. It was just a novel (at the time) mechanism to achieve the coals - which were the acceptance and support of the governments policies with respect to the economy and the war.
He "achieved" those goals by making the government and its leadership seem more like the "common man" citizen than some remote unapproachable oligarch. Instead of dictates, he offered "chats" and discussion, implying dialogue and acceptance, even if neither had actually taken place with the public.
Just as "talkies" disrupted many careers in the movie business, so the transition from print to radio to television affected the practice of politics in American life.
