Social media giant Meta has reached a settlement with US states and territories to resolve a court case related to child safety on Facebook and Instagram.
The tech company will pay a maximum of $16.68bn (£12.26bn), according to court documents.
The settlement requires Meta introduce certain rules for teenage users, including daily limits and night-time blocks.
Meta denied wrongdoing in agreeing to settle.
It was alleged the company had violated numerous federal and state privacy laws for children.
The states suing Meta claimed it used its platforms "to entice, engage, and ultimately ensnare youth and teens," and ignored the damage they did to the "mental and physical wellbeing of America's youth".
After the settlement was announced, District of Columbia Attorney General Brian Schwalb called it a "monumental public health victory".
He added: "The safety features Meta is required to install will fundamentally and immediately change how young people use Instagram and Facebook."
Safety features Meta will need to introduce include limiting access for children during school hours, stronger parental controls and robust age verification for underage users.
"Today, we are announcing an agreement with a bipartisan group of 52 attorneys general across US states, territories, and the District of Columbia, building on our longstanding efforts to empower parents and support teens," Meta said in a statement.
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