Mass media - diversified media technologies that are intended to reach a large audience by mass communication such as TV, film, radio, newspaper, and websites.
Cultivation theory - constant exposure to mass media messages shape its members' beliefs about the world. One example of this is the "mean world syndrome".
Diffusion of innovation theory - how ideas and innovations get disseminated in a society through the following steps: original adopters, early adopters, early majority, late majority and laggards.