Linda Yaccarino, whom Elon Musk hired to run X in 2023, grappled with the challenges the company faced after Mr. Musk took over.

The CEO of X, Linda Yaccarino, said on Wednesday she would step down from the role in a surprise move, ending her tenure at the Elon Musk-owned social media platform that has faced several controversies and challenges including a mass exodus of advertisers from the site.

Elon Musk's X has taken the automated account for Grok, its AI chatbot, offline after it spent Tuesday afternoon pushing antisemitic narratives.

"I think I'm the first person to be specifically sexually targeted by a robot," Will Stancil said about X's bot, Grok.

Among the many changes that have come to X since Yaccarino took over are decreased moderation, a greater reliance on "community notes" that aren't properly doing what they're intended to do and, most recently,