Facebook is under scrutiny as a result of its role in the Cambridge Analytica (CA) scandal, which saw the personal data of tens of millions of users hijacked in 2016.
The company is also facing increasing criticism for providing a platform Newport 100's, Box for hate speech and facilitating foreign interference in elections.
"We didn't do enough to really anticipate that when you connect this many people around the world there are real risks," said Sandberg.
"We're not the same company we were even a few years ago, and that's something we need to prove," she added.
Facebook is currently under investigation by watchdog the Irish Data Protection Commission (DPC) after the social media titan admitted a "bug" may have exposed unposted photos Newport Cigarettes Suppliers, all Quality Newport Cigarettes from up to 6.8 million users.
That probe -- launched in December -- followed an earlier investigation started in October after a security breach exposed 50 million accounts.
The investigations are to be some of the first major tests of stringent new European privacy laws enshrined in the General Data Protection Regulation (GDPR).
Firms can be fined up to four percent of annual global turnover if they fail to abide by the rules -- meaning Facebook faces a theoretical fine of 1.4 billion euros ($1.6 billion), based on its 2017 annual revenue of 35.2 billion euros ($40.6 billion).
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