Consider this short article & video/interview, Facebook shows you what you want to see post-election re: the informational ecosystem that we live in. It argues that we are placed into insulated bubbles of like-minded ideology and hyperpartisan news that results in profound division and the inability to understand each other:
Facebook’s algorithm knows what you like based on the videos you watch, people you talk to, and content you interact with. It then shows you more of the same. This creates something called “filter bubbles.” You begin to see only the content you like and agree with, while Facebook hides dissenting points of view.