In 1960, journalist A. J. Liebling wryly observed that “freedom of the press is guaranteed only to those who own one.” Although he may not have put it in those terms, Liebling was talking about the role of gatekeepers in the media industry, another way in which cultural values influence mass communication. Gatekeepers are the people who help determine which stories make it to the public, including reporters who decide what sources to use, and editors who pick what gets published and which stories make it to the front page. Media gatekeepers are part of culture and thus have their own cultural values, whether consciously or unconsciously. In deciding what counts as newsworthy, entertaining, or relevant, gatekeepers use their own values to create and shape what gets presented to the wider public. Conversely, gatekeepers may decide that some events are unimportant or uninteresting to consumers. Those events may never reach the eyes or ears of a larger public.
In one striking example of how cultural values shape gatekeeping, journalist Allan Thompson points to the news media’s sluggishness in covering the Rwandan genocide in 1994. Almost one million people were killed in ferocious attacks in just 100 days. Yet, as Thompson notes, few foreign correspondents were in Africa, and the world was slow to learn of the atrocities in Rwanda. Instead, the nightly news was preoccupied by the O. J. Simpson murder trial, Tonya Harding’s attack on a fellow figure skater, or the less-bloody conflict in Bosnia (a European country, where more reporters were stationed). Thompson argues that the lack of international media attention allowed politicians to remain complacent. With little media coverage, there was little outrage about the Rwandan atrocities, which contributed to a lack of political will to invest time and troops in a faraway conflict. Richard Dowden, Africa Editor for the British newspaper The Independent during the Rwandan genocide, bluntly explained the news media’s larger reluctance to focus on African issues: “Africa was simply not important. It didn’t sell newspapers. Newspapers have to make profits. So it wasn’t important. Cultural values by gatekeepers on the individual and institutional level downplayed the genocide at a time of great crisis, and potentially contributed to the deaths of hundreds of thousands of people.” 
The digital age hasn’t eliminated gatekeepers; it’s just shifted who they are: “the editors who pick featured artists and apps at the Apple iTunes store, who choose videos to spotlight on YouTube, and who highlight Suggested Users on Twitter.”
Gatekeepers had an especially strong influence in old media, in which space and time were limited. A news broadcast could only last for its allotted half hour, 22 minutes with commercials, while a newspaper had a set number of pages to print. The Internet, in contrast, has room for infinite news reports. The interactive nature of the medium also minimizes the gatekeeper function of the media by allowing media consumers to have a voice as well. News aggregators like Digg.com allow readers to decide what makes it on to the front page. That is not to say that the wisdom or cultural values of the crowd is always wise—recent top stories on Digg have featured headlines like “Top 5 Hot Girls Playing Video Games” and “The girl who must eat every 15 minutes to stay alive.” Media expert Mark Glaser noted that the digital age hasn’t eliminated gatekeepers; it’s just shifted who they are: “the editors who pick featured artists and apps at the Apple iTunes store, who choose videos to spotlight on YouTube, and who highlight Suggested Users on Twitter,” among others. And unlike traditional media, these new gatekeepers rarely have public bylines, making it difficult to figure out who makes such decisions and on what basis. 
Observing how distinct cultures and subcultures present the same story can be indicative of those cultures’ various cultural values. Another way to look critically at today’s media messages is to examine how the media has functioned in the world and in the United States during different cultural periods. [Source]