But she said one of the main things she wanted the victims to know is that "there will be accountability on our side in terms of delivering on the Royal Commission [report]".
"I do want to make sure that after such a hefty piece of work … that we make sure that we're acting upon it."
Most reports of this nature provide a number of recommendations to the Government as to how it can prevent such an event from occurring again.
Ardern has seen the report – as have some the families impacted by the attack.
But the Prime Minister won't elaborate on its findings until they are publically released on Tuesday.
On the report itself, Ardern said it was "significant" – it has some 800 pages.
Although she said it was "pretty distressing" for the victims and survivors to have to relive and revisit the attack in detail, Ardern said she wanted to give those impacted "time and space" to go through the report.
"I think that's the right thing to do."
She was joined by a number of other top members of her Cabinet today, such as Andrew Little and Kris Faafoi.
Prior to today's meeting, Islamic groups have been calling on the Government to appoint a dedicated minister to oversee the report's recommendations.
They have said that a single point of Government contact will streamline the response
Some of the survivors have also expressed concern about how the terrorist was able to get a firearms licence, and want hate speech addressed.
On November 26, new Minister of Internal Affairs Jan Tinetti conformed the Government has received the report and it would be tabled in Parliament – making it public – on Tuesday December 8.