"What is aggressive follow churn? If you decide to follow someone and then change your mind later, you can visit the person’s profile page and unfollow them. Aggressive follow churn is when an account repeatedly follows and then unfollows a large number of Twitter accounts. That may be done to get lots of people to notice them, to circumvent a Twitter limit, or to change their follower-to-following ratio. These behaviors negatively impact the Twitter experience for other people, are common spam tactics, and may lead to account suspension. "