Following Musk's controversial takeover of Twitter, which involved the termination of thousands of employees and the return of far-right and controversial individuals to the platform, the company has been struggling to regain stability and retain its top-paying advertisers. On Thursday, Musk hinted at the hiring of Yaccarino as his replacement as CEO of Twitter and its parent company X Corporation, without disclosing her name.

Yaccarino left the company that holds NBC, Universal, and Telemundo - where she had been employed since 2011 - a few weeks after she interviewed Musk at a marketing conference in Miami.

During her interview with Musk at a marketing conference in Miami, Yaccarino asked how the acquisition had been going to which Musk replied, "It's going well... It's entertaining... It's a trainwreck sometimes."

Yaccarino is a highly regarded executive in the advertising industry, but she will face a challenging task in trying to entice major companies back to the platform.

Musk stated in a tweet that he would continue to oversee design and technology at Twitter, while Yaccarino would primarily focus on business operations and transforming Twitter into a comprehensive "everything app" called X.

Musk has a longstanding association with the letter X, dating back to 1999 when he was involved in the formation of X.com, an online bank that was acquired and eventually evolved into PayPal.

He has expressed a desire to establish an all-encompassing application, similar to China's WeChat, which combines Twitter-like social media functionality with messaging and mobile payment capabilities.

As per the company's website, Yaccarino oversaw a team of 2,000 individuals at NBCUniversal and "restructured the advertising industry for the modern era."

Since becoming the CEO of Twitter in late October, Musk has stirred controversy repeatedly, firing the majority of the company's employees, reinstating far-right figures to the platform, suspending journalists, and implementing fees for previously free services.

Through Yaccarino's appointment, he is finally fulfilling the commitment he made to abide by the outcomes of a Twitter poll he conducted in December.

In that informal poll, over 17 million accounts voted, with 57.5% of the total supporting Musk's resignation from the role of Twitter CEO.

Wall Street had become dissatisfied with Twitter's ability to divert Musk's attention from his other ventures, and the announcement of a new CEO led to a rise in Tesla's stock price.