Facebook and Twitter both issued statements in response to the court ruling, saying they would continue to review the court’s decision.
They also said they would “continue to engage closely with the FTC” as they develop new ways to promote advertising.
Facebook, which was one of the biggest online advertisers in the U.S., has been under fire for its handling of ads.
In response to a federal complaint filed last month, the company said it had more than 7 million ads placed with a total value of $8.7 billion, but the FTC later said that number was a “significant undercount” and “a fraction” of that amount.
Facebook and the FTC did not immediately respond to a request for comment.
Twitter has also had to respond to the ruling, and it said it was reviewing the ruling “very carefully.”
“We’re reviewing the court order and will be responding to the FTC as needed,” a Twitter spokesperson told ABC News.
The court decision also found that Facebook’s decision to use a fake news source to target ads in its “trending topics” section was illegal, as the news was not accurate or up-to-date.
“The fact that Facebook was using fake news to target advertising was an egregious violation of the First Amendment,” said Jessica Rich, director of the FTC’s Bureau of Consumer Protection, in a statement.
The FTC says Facebook has been violating the law since the beginning of 2018.
Twitter said it is reviewing the decision and would have no further comment at this time.
“We will continue to closely monitor the situation,” a spokesperson for the social network said in a tweet.
The Facebook spokesperson also said that “we’re very excited to see what the FTC will come up with next to address the issue.”
Facebook is facing new scrutiny as it tries to gain traction in new ways, including through the new media platform, Oculus VR.
The social network is in the midst of a massive rollout of virtual reality devices, including the Oculus Rift and HTC Vive, which have launched with limited support and limited consumer appeal.
Facebook has also begun to experiment with new ways of reaching its audience.
The company is investing heavily in advertising, and Facebook CEO Mark Zuckerberg is said to have spent $100 million on his political ads campaign, according to The Wall Street Journal.