"Bias" refers to our tendency to have a preconceived opinion about something or someone in a way that usually influences our judgment negatively. Bias is found in media sources of all kinds, including in news sources. Bias is not necessarily indicative of "fake," but bias can be difficult to detect, since bias can cause a journalist or news reporter to take a narrow view of a particular topic/news story.
Seek out news sources that challenge your views, and make it a habit to do so. Explore the image to the right for ideas about where you can read news sources that cover a wide spectrum.
image: Pew Research Center