Thirty-million users have signed up for Mark Zuckerberg's newly-launched Threads app on its first day.
The owner of Facebook, Instagram, and WhatsApp - Meta - has released its direct competitor to Elon Musk's Twitter, which offers a text-based version of Instagram.
US correspondent Richard Arnold told Tim Dower this is a significant move from the Meta boss.
He says Zuckerberg hopes to turn Threads into a 'mega app', something Zuckerberg says Musk has failed to do with Twitter.
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