What was the major advertising medium in the United States between 1920 and 1950?

Question

Quizplus · Accepted Answer

The major advertising medium in the United States between 1920 and 1950 was radio. This is because during this time, radio became a popular source of entertainment, and advertisers recognized its potential to reach a large audience. Radio allowed advertisers to promote their products to a wide range of people, regardless of their geographic location. Newspapers and billboards were also used during this time, but they were not as effective as radio in terms of reaching a national audience. Television did not become a major advertising medium until the 1950s.

What Was the Major Advertising Medium in the United States