The three new Facebook Publisher Principles are as follows:

People on Facebook value meaningful, informative stories.

People on Facebook value accurate, authentic content.

People on Facebook value standards for safe, respectful behavior.

As part of the second principle, the social network warns that it has added "universal signals" that improve the News Feed algorithm's ability to spot fake news. It will now keep an eye out for clickbait headlines, such as ones that tease a piece of info without revealing it ("You'll Never Believe Who Tripped and Fell on the Red Carpet...") or misleading ones meant to sensationalize a piece of information ("Apples Are Actually Bad For You?!"). The website won't give publishers points for linking to low-quality websites with little content and lots of ads as well.

Facebook is making it "as difficult as possible for those posting false news to buy ads" by using machine learning to detect purchases by spam accounts. It recently disabled non-Publisher Pages' ability to edit their posts' metadata to prevent cloaking, or the redirecting of users to websites that don't lead to what they originally expected to visit. Now, it will also give Pages that cloak their posts very low scores, so they won't appear on people's News Feeds.

The company is also taking this chance to remind publishers what they can and can't post in an effort to squash abusive content on the platform. Facebook stresses that it will remove posts that contain sexual activity, those that incite violence, bullying or harassment, hate speech and other graphic content.

Facebook explains: