By: Sarah Marshall

The wide availability of user-provided content in online social media facilitates the aggregation of people around common interests, worldviews, and narratives. However, the World Wide Web is a fruitful environment for the massive diffusion of unverified rumors. In this work, using a massive quantitative analysis of Facebook, we show that information related to distinct narratives––conspiracy theories and scientific news––generates homogeneous and polarized communities (i.e., echo chambers) having similar information consumption patterns.

Source: The spreading of misinformation online

Basically, Facebook becomes an echo chamber for like minded individuals, limiting access to information that is contrary to the beliefs of the echo chamber.