Facebook is tweaking its news feed algorithm once again and is this time making adjustments so that your feed is more "personally informative." The social network wants to fully implement an updated ranking system that's personalized to every user based on their interests and habits.
That ranking system will be used to adjust every user's news feed. Stories which are deemed more interesting to you as an individual will appear higher.
Facebook bases the system on what your listed interests are, your history on the site, your connection the publisher/user, and your responses to its news feed quality surveys.