Social media giants have become the target of a global movement started after the Christchurch mosque attacks.
It comes after world leaders and tech giants met for a second time on May 15 to try and tackle online terrorist content, as part of the Prime Minister's response to the Christchurch Mosque Attacks.
The Christchurch Call was launched after the mosque attacks, which was shared live online. The mass shooter admitted he was radicalised by YouTube.
Prime Minister Jacinda Ardern said: "The call is about preserving the use of internet as a force for good."
Last week the US joined this global effort and its intention of improving behaviour on the internet.
But hopes the US president would join today's Zoom call soon disappeared.
Ardern said despite US President Joe Biden not showing up to the meeting, she doesn't feel the US membership is simply lip service.
"We were really pleased in recent weeks to have the official commitment of the US."
Muslim chaplain Ibrahim Abdelhalim said he was pleased to see the US finally join but said he wanted more action to be taken.
"This is a good step, but it's not enough. We hope in future US take a bigger responsibility."
The Christchurch call started in Paris in 2019 with 17 countries and companies signing up and on May 15, 2021, there were 120 members.
Ardern said she is hoping for more countries signing up for the Christchurch Call in 2022.
Ardern said she doesn't ask the tech giants like Facebook, Microsoft, Twitter and Youtube to do anything more than uphold their terms of service.
A key focus of the summit during this meeting was the way social media prioritises and profit from extreme content.
Ardern said she is calling for ethical and transparent use of algorithms, the underlying codes controlling what you see on social media.
UK Prime Minister Boris Johnson claimed the "terrorist content is like a metastasizing tumour within the internet".