How does mass media shape the public's agenda of issues?

Mass media shapes the public's agenda of issues by determining which information will be heard and when it will be heard. Mass media outlets are the gatekeepers of information and they determine what is important and what is not important. Small issues can be blown up by media that thinks the issue will draw viewers. On the other hand, major isses can be pushed adide and ignored by the media. once issues are out of the media and out of the public eye, oftentimes they are quickly forgotten. The media outlets only want to show issues that will draw viewers and therefore bring in revenue. They focus on what they think will be popular and that shapes the public's agenda of issues.