Facebook is looking for quality content

"Does this matter to my friends?" Is the question Facebook invites its users to ask before putting anything on the wall. So they argue the changes they are going to make in their interesting content display engine.

More relevant content and more quality. Those are the concerns of Mark Zuckerberg's social network. In the presentation of this improvement they set out the criteria used to give more exposure to some posts: that it is relevant and lasting over time, that it comes from a trusted source, think about whether it would be recommended to a friend.

In addition, they will prevent the deliberate promotion of 'memes' or 'likes' requests.

Source:   The Digital Country