When people subscribe to third party sites, they are able to see updates in these sites’ newsfeeds, very similar to subscribing to someone’s profile on Facebook.
A blog post from Facebook further explains the new feature:
The Subscribe button for websites works just like the button on Facebook; once clicked the user will begin seeing the public posts of the person they have subscribed to in his or her News Feed. The subscribe action is also shared — allowing others to subscribe directly via the News Feed stories, and further increasing viral distribution.
Raju Narisetti, the managing director at The Post said, with the click of a button, users can seamlessly get updates to their FB walls from some of the journalists behind Post stories.
The Post has aggressively embraced the integration of Facebook. It started last September when newspaper and FB launched a social reader app that enables individuals to read and post articles for The Post and its partner sources.
Other companies have also started to use the Subscribe button. Among these are Absolute Radio, The Daily Beast, The Washington Post, The huffington Post, Today.com and one of the world’s leading magazines, Time.com.