Satire tag
Facebook adds a satire tag to help people distinguish between real news articles and satirical articles from sites like The Onion. A Facebook representative says they added it in response to user demand:
We are running a small test which shows the text ‘[Satire]’ in front of links to satirical articles in the related articles unit in News Feed. This is because we received feedback that people wanted a clearer way to distinguish satirical articles from others in these units.