Facebook announced that will give more control over what users see in their News Feed. Whit this new option you can choose what kind of News Feed items are most important to you, like friends and pages you see first. It willalso allow you to find new pages easily, and quickly unfollow people and pages to stop seeing their posts.
According to Facebook:
With an updated design of the tools we previously launched, you can now see a list of the top people, Pages and groups that you’ve seen in your News Feed over the past week, and choose to unfollow any friend, Page or group if you don’t want to see their updates. You can also see who you’ve unfollowed in the past and choose to re-follow them at any time.
This isn’t already working, only for iOS devices, so Android users will see them appear over the next few weeks.