(1) Description of the pattern
Media outlets that are controlled by a small number of corporations often broadcast propaganda that aligns with the interests of those corporations. Information that challenges or opposes those interests is rarely given through mainstream media sources.
(2) Why the pattern is good (i.e. bad)
If media is controlled by corporations, pro-business perspectives can dominate. This will also inhibit marginalized groups from spreading their messages. When we allow these media sources to frame the way we view current issues then the way we respond to those issues is informed and manipulated by corporate interests. Media monopolies try to ensure that the public thinks a certain way, and that they are overwhelmed by a sense of superficiality and fear (see Fear Mongering pattern).