Users should be "sceptical" of catchy headlines "in all caps with exclamation points" and look closely at the web addresses of stories, as many fake news sites mimic the addresses of "authentic news sources", Facebook will tell users.
Take a look at the source and the URL, as sometimes you can spot fake news on Facebook with sources that are unfamiliar to you because they exist simply to manipulate your view on something.
An initiative being launched in the US, France and a dozen other countries added an educational tool in an "awareness display" in news feeds at the leading online social network.
According to the blog about the new addition, Facebook worked in collaboration with First Draft, a nonprofit dedicated to improving skills and standards in the reporting and sharing of information online. Many false news sites have misspellings or awkward layouts.
Check the evidence. Check the author's sources to confirm that they are accurate.
Facebook said it was also said it was taking steps to make it more hard for those posting fake news stories to purchase adverts on the site. If the story is reported by multiple sources you trust, it's more likely to be true.
These include looking at an article's URL, investigating the source of a story and thinking more critically about whether an article is a joke.
Fake news became a serious issue in the USA election campaign, when clearly fraudulent stories circulated on social media, potentially swaying some voters. Check whether the source is known for parody, and whether the story's details and tone suggest it may be just for fun.
Some stories are intentionally false.
"False news is harmful to our community, it makes the world less informed, and it erodes trust", Mosseri said. Finally, Facebook recommends that you should only share news you know to be credible. "It could depend on individual organizations, but we want to engage responsibly and if that means a financial arrangement, we are very open to it".
Google past year incorporated a "fact-check" tag into some news pages published south of the border to help readers of more prominent stories find fact-checked content and said it was actively working to bring the feature to Canada "in the near future".
Facebook also says it plans to build products to stop false news from spreading. How many of Facebook's 1.8 billion users will actually take the time and effort to do that?