Facebook has announced that they will be slowly phasing out the Share button. If you want to share articles in the future, you would have to Like it instead. Right now, when you Like something, it only shows up as a single line on your news feed, while if you Shared something, you’d get the full story, with the headline attached, a thumbnail and a link to the original post.
So the Like button will act like the Share button instead. It’s good for those who make the content as they will get more links, but there will be a lot more content on your page. We aren’t sure what they are thinking with this tweak, but I guess we will see it in action soon.