"Children's safety must come first. We expect the tech giants to take responsibility for protecting children and young people on their platforms," Prime Minister Jonas Gahr Støre (Ap) says in a press release.
Meta owns platforms including Facebook, Instagram and WhatsApp.
Norway is planning to introduce a 16-year age limit for social media. The goal is to present a bill before the end of the year, and the law is intended to come into force in 2027.
In the letter, the government emphasizes the need for age verification solutions to prevent underage children from accessing the platforms.
