Facebook CEO Mark Zuckerberg has admitted Facebook has made mistakes.
News broke last Friday that Cambridge Analytica, a UK-based political data-analytics firm hired by the 2016 Trump campaign, got its hands on data for 50 million Facebook users - without the users' knowledge or consent.
"I've been working to understand exactly what happened and how to make sure this doesn't happen again. The good news is that the most important actions to prevent this from happening again today we have already taken years ago. But we also made mistakes, there's more to do, and we need to step up and do it," Zuckerberg wrote in a blog post Wednesday.
He said Facebook will now investigate all apps that had access to "large amounts of information" before Facebook changed its platform to reduce data access in 2014.
They will also restrict developers data access and create a tool to allow app users to have more control over what they share.