Currently, Facebook is testing Explore Feed with users in Sri Lanka, Bolivia, Slovakia, Serbia, Guatemala, and Cambodia. With Explore Feed function, Facebook removes all posts published on Facebook Pages from the main News Feed and moved those posts to show in "Explore Feed" section in its app or website. I personally think this function will kill Facebook Page.
Organic reach of Facebook Page will decline or won't work. Facebook wants Facebook Page owner to push the post with ads.