https://techcrunch.com/2019/03/31/why-facebook/

Facebook announced today that it is adding a feature called “Why am I seeing this post?” to News Feeds. Similar to “Why am I seeing this ad?,” which has appeared next to advertisements since 2014, the new tool has a dropdown menu that gives users information about why that post appeared in their News Feed, along with links to personalization controls.

Meant to give users more transparency into how Facebook’s News Feed algorithm works, the update comes as the company copes with several major events that have highlighted the platform’s shortcomings, including potentially harmful ones. These include its role in enabling the dissemination of a video taken during the shooting attacks on New Zealand mosques two weeks ago, which were originally broadcast using Facebook Live; a lawsuit filed by the U.S. Department of Housing and Urban Development that accuses Facebook’s ad-targeting tool of violating the Fair Housing Act and its role in spreading misinformation and propaganda (after years of complaints and criticism, Facebook recently announced plans to downrank anti-vaccination posts and ban white nationalist content.