US billionaire Elon Musk has clinched a deal to buy social media platform Twitter for $44 billion. The Twitter Board announced on Monday they had accepted Musk's offer. Musk has voiced concerns about the company's future after the takeover. He has been vocal against Twitter's moderation of free speech, which saw the suspension of former U.S. President Donald Trump's account. He made an offer to buy Twitter on March 14 and has vowed to ensure the right to free speech takes precedent on the platform.