Last year Alexander studied "fake news" during a Wolfson Press Fellowship to Cambridge University, which cemented her interest in the ethics of big tech.
"The group provides an informal way to test policy ideas and inform government thinking about its response to the role of social media in the events of 15 March, 2019 in Christchurch," an OIA response to Herald columnist Matthew Hooton from PM Jacinda Ardern's chief of staff Mike Munro stated.
Some members of the group met with Ardern in Auckland on April 5.
"This office and the Department of the Prime Minister and the Cabinet assembled the group to have a mix of technology sector, media and legal expertise," Munro wrote.
"The Government chief digital officer and the Minister for Government Digital Services, Hon Megan Woods, provided input on their selection."
Just days after the first meeting of members of the group and the PM, Ardern said the global community should "speak with one voice" when it comes to blocking harmful content on social media platforms.
"I wanted to make sure I had the views of those that work in the [social media] space, particularly given that questions are being raised around what role New Zealand could and should play in this debate at an international level," Ardern said four days after the meeting.
At the time she said she would be happy to say who she met, but would seek their permission to do so first.
Ardern has three key events in Paris; a Voices of Action meeting with civil society members, a round table meeting with tech companies, and the Christchurch Call summit with heads of state and tech companies.