Media bias describes a certain perception that there are parts of the press (or mass media) that have an agenda and is trying to push a particular viewpoint or perspective on certain matters. They do this instead of doing what they are suppose to do – report news or air programs from an objective standpoint. Media bias often refers to the media as a collective whole – newspaper conglomerates and television or radio networks and not just individual reporters or writers.
Almost all networks or publications are at some point accused of media bias. Media bias is seen by people in the choice of certain words, in the time limits imposed on programming, and the sponsorships on programs and program segments are seen as examples of media bias. People who report or write the news are always on their toes about this and are vigilant to make sure that their own opinions do not transfer to what they do. But even with this kind of vigilance, media bias can also be seen in how reporters put inflections on their reportage or on the tone of their voice.
A form of media bias that is identified by many people is the inability to include all of the points of view for a particular story. This is seen as a failure to represent opposing viewpoints. But for a media establishment it can sometimes be impossible to include all these perspective on an issue because people usually look at issues from different perspectives already.