Elon Musk announced that starting June 27, 2025, hashtags will be banned from advertisements on the social media platform X, formerly known as Twitter. Musk described hashtags as an "esthetic nightmare" and criticized their cluttered appearance in ads. This change aims to improve the aesthetic quality of advertisements and is supported by the platform's upgraded recommendation engine powered by xAI, which Musk claims makes hashtags unnecessary for engagement. While hashtags will no longer be permitted in paid ads, regular user content will continue to allow them for the time being. In addition to the hashtag ban, X will begin charging advertisers based on the vertical size of their ads, marking a shift in the platform's advertising pricing model. These changes reflect Musk's ongoing efforts to refine the user experience and advertising effectiveness on X.