In a conference call with reporters Wednesday, Zuckerberg said he wishes he could snap his fingers and solve everything in three to six months. But, he said, "these are big issues" and a big shift for Facebook.
That says, he says the company will have "turned a corner" on a lot of these issues by the end of the year.
Zuckerberg has set fixing Facebook as his personal challenge for 2018.
The issues Facebook needs to address go beyond the privacy scandal involving Trump-affiliated consulting firm Cambridge Analytica. Facebook also has been dealing with fake news, the use of Facebook to spread hate and discord and concerns about social media's effect on people's mental well-being.
Facebook CEO Mark Zuckerberg has admitted mistakes and says his company hasn't taken a broad enough view of what its responsibility is in the world.
In a call with media on Wednesday, Zuckerberg calls this a "huge mistake" and added, "it's my mistake."
Referring to the Cambridge Analytica privacy scandal, he said that it isn't enough for Facebook to believe app developers when they say they follow the rules. He says Facebook has to ensure they do.
Earlier in the day, Facebook revealed that as many as 87 million people might have had their data accessed by Cambridge Analytica — an increase from the 50 million disclosed in published reports.
Facebook is restricting the user data it allows outsiders to access as part of steps it's taking to address the fallout from its worst privacy crisis in years.
The company is reeling from the news that a Trump-affiliated data-mining firm used ill-gotten data from millions of users to try to influence elections. Facebook says as many as 87 million people may have had their data accessed - an increase from the 50 million disclosed in published reports.
Among the latest changes: Facebook is restricting access that apps can get about users' events, as well as information about groups such as member lists and content.
In addition, the company is also removing the option to search for users by entering a phone number or an email address. While this helped individuals find friends who may have a common name, Facebook says businesses that had a phone or email information on customers were able to collect profile information this way.
Facebook says as many as 87 million people may have had their data accessed in the Cambridge Analytica scandal — an increase from the 50 million disclosed in published reports.
Cambridge Analytica, a data-mining firm affiliated with President Donald Trump's campaign, has been accused of using ill-gotten data from Facebook users to try to influence elections.
This coming Monday, all Facebook users will receive a notice on their Facebook feeds with a link to see what apps they use and what information they have shared with those apps. They'll have a chance to delete apps they no longer want.
Users who had their data shared with Cambridge Analytica will be told of that within that notice. Facebook says most of the affected users are in the US.
Now that Mark Zuckerberg is set to testify before Congress, he'll need advice not just from lawyers but from communications specialists, too, on addressing Facebook's privacy scandal.
Public-relations experts who have prepped CEOs before say that congressional hearings are more political theatre than public policy. The so-called "optics" — how things look — are as important as what you say.
Other advice for the Facebook CEO? Appear sympathetic and be ready for a beating. Take responsibility. Don't feign ignorance.
The stakes are high for Zuckerberg's April 11 appearance before the House Energy and Commerce Committee.
The company unveiled the revisions Wednesday as it faces one of its worst privacy scandals in history. Although Facebook says the changes aren't prompted by recent events, it's an opportune time. CEO Mark Zuckerberg is also set to testify before Congress next week for the first time.
Among Wednesday's changes: Facebook has added a section explaining that it collects people's contact information, which may include call logs and text histories. The previous policy did not mention call logs or text histories. Several users were surprised to learn recently that Facebook had been collecting such data.
The leaders of a House oversight committee say Facebook CEO Mark Zuckerberg will testify before the panel on April 11.
In an announcement Wednesday, Reps. Greg Walden and Frank Pallone said the hearing will focus on the Facebook's "use and protection of user data." Facebook is facing scrutiny over its data collection following allegations that the political consulting firm Cambridge Analytica obtained data on tens of millions of Facebook users to try to influence elections.
Walden, R-Ore., is the House Energy and Commerce committee's chairman. Pallone of New Jersey is the panel's top-ranking Democrat. They say the hearing will be "an important opportunity to shed light on critical consumer data privacy issues and help all Americans better understand what happens to their personal information online."