Facebook founder Mark Zuckerberg has outlined plans for how he hopes to combat fake news on the site.
Facebook became mired in controversy after some users complained fake news changed the outcome of the US election.
Mr Zuckerberg posted details of several projects to "take misinformation seriously", including methods for stronger detection and verification.
He previously responded to criticism of fake news on Facebook by saying over 99% of its content was "authentic".
In his post, billionaire Mr Zuckerberg said: "We've been working on this problem for a long time and we take this responsibility seriously."
But he said the problems were "complex, both technically and philosophically." He noted Facebook did not want to discourage the sharing of opinions or become "arbiters of truth".
- Stronger detection. The most important thing we can do is improve our ability to classify misinformation. This means better technical systems to detect what people will flag as false before they do it themselves.
- Easy reporting. Making it much easier for people to report stories as fake will help us catch more misinformation faster.
- Third party verification. There are many respected fact checking organizations and, while we have reached out to some, we plan to learn from many more.
- Warnings. We are exploring labeling stories that have been flagged as false by third parties or our community, and showing warnings when people read or share them.
- Related articles quality. We are raising the bar for stories that appear in related articles under links in News Feed.
- Disrupting fake news economics. A lot of misinformation is driven by financially motivated spam. We're looking into disrupting the economics with ads policies like the one we announced earlier this week, and better ad farm detection.
- Listening. We will continue to work with journalists and others in the news industry to get their input, in particular, to better understand their fact checking systems and learn from them.
In the wake of the US presidential election results last week, many criticised Mr Zuckerberg, saying fake news on Facebook aided the rise of Donald Trump.
He dismissed the idea as "crazy" but fake news sites are on the rise due to the profits which can be made from web advertising.
Fake news purveyors can be enticed away from creating funny satirical content to more believable content because they think it is more likely to be shared.
One such story, which was widely shared on Facebook after the election, falsely claimed Hollywood actor Denzel Washington had praised Mr Trump.