What was the impact of radio and the movies in the 1920s?

The greatest impact of radio and television in the 1920s was that people realized for the time that information can travel around the globe in a matter of seconds and minutes, as opposed to hours and days, previously. This had a profound impact on the way businesses operate, the fact that investors could receive up-to-the-minute information, and it opened up a whole new category of employment in the areas of broadcasting, broadcasting technology including engineering, sound, and optics, and it started a new revolution in which companies reached their potential customers through the first practices of commercials.