Twitter bots are the autonomous programs that can interact with users like an individual account. Usually, bots have negative connotation because the manner in which most of them operate, like a spam account sending messages that are unwelcomed or spreading fake news. In the 2016 American election, bots were frequently used on social media with impunity to spread political and electoral misinformation. Twitter tried course correction by an enforcement team to track the bot accounts. But now, Twitter has decided to label the bot accounts and identify the good bots.
Source:- https://www.indialegallive.com/associate/twitter-good-bots-may-turn-bad-rachit-kaushik/