https://techcrunch.com/2019/11/21/twitter-rolls-out-its-hide-replies-feature-to-all-users-worldwide/

Twitter’s radical “Hide Replies” feature, one of the biggest changes to how Twitter works since the invention of the Retweet, is now available to Twitter’s global user base. The company says the feature will roll out to all Twitter users across platforms by today, with only one slight tweak since earlier tests.

Designed to balance the conversation on Twitter by putting the original poster back in control of which replies to their tweets remain visible, Hide Replies has been one of Twitter’s more controversial features to date. While no replies are actually deleted from Twitter when a user chooses to hide them, they are placed behind an extra click. That means the trolling, irrelevant, insulting, or otherwise disagreeable comments don’t get to dominate the conversation.