If you're really curious, Facebook released the internal trending curation guidelines for anyone to read.[0] [0]https://fbnewsroomus.files.wordpress.com/2016/0

If you're really curious, Facebook released the internal trending curation guidelines for anyone to read.[0] [0]https://fbnewsroomus.files.wordpress.com/2016/05/full-trending-review-guidelines.pdf https://fbnewsroomus.files.wordpress.com/2016/05/full-trendi...