In 2016, Facebook is embroiled in controversy over Russia's alleged use of it and other social media platforms to try influence the outcome of the election that brought Donald Trump to the White House.
In 2018, Facebook is again at the center of scandal after it emerges that British consulting firm Cambridge Analytica stealthily harvested the personal data of millions of Facebook users and used it for political purposes, including trying to rally support for Trump.
Zuckerberg is grilled in the U.S. Congress over Facebook's handling of user data and the way the network is being manipulated to undermine democracy.
The Facebook boss vows to do more to combat fake news, foreign interference in elections and hate speech and to tighten data privacy.
In 2021, Zuckerberg announces that Facebook has changed its company name to Meta -- Greek for "beyond" but also meaning the metaverse -- the virtual world which he sees as representing the future of the internet.
On February 3, 2022, the company's share price plunges, wiping more than $200 billion off its market value after it warns of slowing revenue growth.
As young users increasingly desert it for the likes of TikTok or Snapchat, the company admits to losing a million active daily users. But with 1.96 billion users, one- quarter of the globe's population it remains the biggest social media platform.
