Jane is a technology reporter.
For an avid tweeter, it seemed somewhat ironic that Musk didn't actually mention his new stake in the micro-blogging site.
It might have been because Musk now owns a 9.2% passive stake, which he does not expect to stay that way for long.
His first move was to ask if people want an edit button, something he has been calling for for a long time.
The announcement that he will join the board came as no surprise.
Through conversations with Elon in recent weeks, it became clear to us that he would bring great value to our Board.
The BBC is not responsible for the content of external sites.View original tweet on TwitterI’m excited to share that we’re appointing @elonmusk to our board! Through conversations with Elon in recent weeks, it became clear to us that he would bring great value to our Board.
— Parag Agrawal (@paraga) April 5, 2022
As a passionate believer and intense critic of the service, he is exactly what we need.
Musk said he was looking forward to making changes at the social network giant.
The BBC is not responsible for the content of external sites.View original tweet on TwitterLooking forward to working with Parag & Twitter board to make significant improvements to Twitter in coming months!
— Elon Musk (@elonmusk) April 5, 2022
Musk's 9.2% stake in the social media company may sound small, but Dan Ives, from analyst firm Wedbush, describes it as "eye-popping" - equating to 73.5 million shares in the social network.
The revelation that the founder of the company had become the largest shareholder in the company has caused shares in the platform to increase in value.
The difference between Musk and Jack Dorsey is four times greater.
Mr Ives believes that the South Africanentrepreneur now has his eyes on the company and will push for an active role in the management.
We would expect this passive stake as just the start of broader conversations with the board and management that could lead to an active stake and a potential more aggressive ownership role of the company.
Musk has a love-hate relationship with the micro-messaging service. He has a reputation for controversy on the social media site, with more than 80 million followers.
Last year he asked if he should sell 10% of his stock in his electric car firm, to which users said "yes", and the platform seems to suit his impulsive personality. Musk sold around $5 billion of shares in the firm in November.
He offered to sign a $6 billion cheque if the WFP could explain how it would be used to solve hunger around the globe.
He has gotten into trouble because of his use of social media. The Securities and Exchange Commission began an investigation after a post about the company&s stock price. It's not clear if that actually happens.
The Wall Street Journal reports that the line "Not Applicable" was included in his SEC share filing, which is normally a line saying he doesn't intend to influence the company.
Questions have been raised about the timing of the deal, which could put Musk at odds with regulators again.
His investment in the micro-blogging site was announced this week. Disclosure is required within 10 days of acquiring 5% of a company.
Musk uses a variety of methods to gauge how he runs his companies, but one of the most important is using his own account on the social networking site.
He asked users if they believed that free speech was essential to a functioning democracy after he lodged his investment with the SEC.
The assistant professor at Cornell University thinks this is evidence that he may use his new stake to try to influence the practices of social media.
Some see more immediate issues with his musings.
The questions could be seen as a form of market manipulation by the SEC, according to the partner at the law firm.
The man is clearly watching his every move. In response to his edit button poll, he urged voters to be careful.
He said the consequences of the poll will be important, like the same words Musk used after he launched his free speech poll.
Critics point out that it could allow people to fundamentally change the meaning of a message after they've been shared.
It would be a big change to include an edit button, and Musk wants to be part of that conversation.
For a while last month, it looked as if Musk was going to build a new social media platform as a rival to the micro-messaging service.
Donald Trump, who was banned from social media in January 2020 after the Capitol riots, announced last autumn that he was launching his own social network to "stand up to the tyranny of big tech."
There is a waiting list of 1.5 million people who are unable to use the platform, which was branded a disaster by Joshua Tucker, director of NYU's Center for social media and politics.
Two executives quit after the launch.
There will be a sigh of relief for those with shares in Musk's other businesses, because he didn't go the same route as Mr Trump.
He has a passion project that distracts him from the serious business of running his established firms.
The issues that might be raised about the deal by the SEC are not included.
It is not the first time a big tech firm has looked at the micro-blogging site. Ballmer once bought a four percent share of the company and did nothing with it.
He says that Ballmer never did the same thing as Musk did.
It is most likely that Musk will let the world know what he is going to do next.