But what people actually read on Facebook is what’s in their News Feed … and its contents, in turn, are determined not by giving everyone an equal voice, and not by a strict chronological timeline. What you read on Facebook is determined entirely by Facebook’s algorithm, which elides much — censors much, if you wrongly think the News Feed is free speech — and amplifies little.
— Read on techcrunch.com/2019/10/20/facebook-isnt-free-speech-its-algorithmic-amplification-optimized-for-outrage/