The social media platform is introducing a "one-strike" policy for its Facebook Live feature, which will temporarily restrict access for users who have broken the social network's guidelines and faced disciplinary action, the company said in a statement.
Ardern said Facebook removed 1.5 million copies of the video within 24 hours of the attack, but she still found herself among those who inadvertently saw the footage when it auto-played on their social media feeds. From now on, anyone who violates our most serious policies will be restricted from using Live for set periods of time - for example 30 days - starting on their first offense.
Specifically, the company wants to get better at detecting edited versions of clips - say, for instance, a banned clip that has its audio and colors distorted - and at identifying if the poster is innocently sharing an image of someone intentionally manipulating videos and photos to bypass Facebook's systems.
Rosen said these restrictions will be extended to other areas of the platform over the next few weeks, which will begin with restricting offending users from taking out ads. "Our goal is to minimize risk of abuse on Live while enabling people to use Live in a positive way every day".
The announcement comes as Jacinda Ardern co-chairs a meeting with French President Emmanuel Macron in Paris on Wednesday seeking to have world leaders and chiefs of tech companies sign the "Christchurch Call", a pledge to eliminate violent extremist content online.
New Zealand Prime Minister Jacinda Ardern has welcomed the move, saying it has acted on the "Christchurch Call" for online terror material to be shut down.
"I've spoken to Mark Zuckerberg directly twice now. and he did give Facebook's support for this call to action", Ardern said.
The initiative, known as the "Christchurch call", was pushed by Ardern after a self-described white supremacist gunned down 51 people in a massacre at two mosques in the New Zealand city in March, the country's worst atrocity of recent times.
The White House will not sign an global call to combat online extremism brokered between French and New Zealand officials and top social media companies, amid USA concerns that it clashes with constitutional protections for free speech.
The New Zealand leader earned huge worldwide prominence and respect after the attacks by reaching out to Muslim communities at home and vowing a widescale crackdown on extremist content.
"(We're) asking both nations and private corporations to make changes to prevent the posting of terrorist content online, to ensure its efficient and fast removal and to prevent the use of live-streaming as a tool for broadcasting terrorist attacks", she wrote in The Times.