X, stylized as the mathematical symbol .mw-parser-output .monospaced{font-family:monospace,monospace}U+1D54F 𝕏 MATHEMATICAL DOUBLE-STRUCK CAPITAL X, formerly called Twitter, is an online social media and social networking service operated by the American company X Corp., the successor of Twitter, Inc. On X, registered users can post text, images and videos. Users can also like, repost, quote repost, comment on posts, direct message, video and audio call, bookmark, join lists and communities, and join public Spaces with other registered users. Users can vote on context added by approved users using the Community Notes feature. Posting information to the site is often referred to historically as tweeting, retweeting and quote tweeting/retweeting . Although the service is now called X, the primary website address remains twitter.com as of November 2023 , with the x.com domain name redirecting to that address.