information:extraction, information:classification
Russian interference

In 2018, Special Counsel Robert Mueller indicted 13 Russian nationals and three Russian organizations for "engaging in operations to interfere with U.S. political and electoral processes, including the 2016 presidential election."

Mueller contacted Facebook subsequently to the company's disclosure that it had sold more than $100,000 ($ 126,955 in 2023 dollars) worth of ads to a company (Internet Research Agency, owned by Russian billionaire and businessman Yevgeniy Prigozhin) with links to the Russian intelligence community before the 2016 United States presidential election. In September 2017, Facebook's chief security officer Alex Stamos wrote the company "found approximately $100,000 in ad spending from June 2015 to May 2017 – associated with roughly 3,000 ads – that was connected to about 470 inauthentic accounts and Pages in violation of our policies. Our analysis suggests these accounts and Pages were affiliated with one another and likely operated out of Russia." Clinton and Trump campaigns spent $81 million ($ 103 million in 2023 dollars) on Facebook ads.

The company pledged full cooperation in Mueller's investigation, and provided all information about the Russian advertisements. Members of the House and Senate Intelligence Committees have claimed that Facebook had withheld information that could illuminate the Russian propaganda campaign. Russian operatives have used Facebook polarize the American public discourses, organizing both Black Lives Matter rallies and anti-immigrant rallies on U.S. soil, as well as anti-Clinton rallies and rallies both for and against Donald Trump. Facebook ads have also been used to exploit divisions over black political activism and Muslims by simultaneously sending contrary messages to different users based on their political and demographic characteristics in order to sow discord. Zuckerberg has stated that he regrets having dismissed concerns over Russian interference in the 2016 U.S. presidential election.

Russian-American billionaire Yuri Milner, who befriended Zuckerberg between 2009 and 2011, had Kremlin backing for his investments in Facebook and Twitter.

In January 2019, Facebook removed 289 pages and 75 coordinated accounts linked to the Russian state-owned news agency Sputnik which had misrepresented themselves as independent news or general interest pages. Facebook later identified and removed an additional 1,907 accounts linked to Russia found to be engaging in "coordinated inauthentic behaviour". In 2018, a UK Department for Digital, Culture, Media and Sport (DCMS) select committee report had criticised Facebook for its reluctance to investigate abuse of its platform by the Russian government, and for downplaying the extent of the problem, referring to the company as 'digital gangsters'.

"Democracy is at risk from the malicious and relentless targeting of citizens with disinformation and personalised 'dark adverts' from unidentifiable sources, delivered through the major social media platforms we use every day," Damian Collins, DCMS Committee Chair

In February 2019, Glenn Greenwald wrote that a cybersecurity company New Knowledge, which is behind one of the Senate reports on Russian social media election interference, "was caught just six weeks ago engaging in a massive scam to create fictitious Russian troll accounts on Facebook and Twitter in order to claim that the Kremlin was working to defeat Democratic Senate nominee Doug Jones in Alabama. The New York Times, when exposing the scam, quoted a New Knowledge report that boasted of its fabrications..."