Fěnsī men zài shèjiāo méitǐ shàng hé míngxīng hùdòng.
Fans interact with celebrities on social media.
Tips
usage
互动 has become extremely common in the digital age. On Chinese social media (Weibo, Douyin, Bilibili), 互动 means likes, comments, shares - any engagement. 互动率 (hùdònglǜ) is 'engagement rate.'
grammar
互动 can be a verb (我们来互动一下, let's interact) or a noun (增加互动, increase interaction). Adding 性 makes it an adjective: 互动性 (interactivity).
