https://techcrunch.com/2018/07/26/twitter-says-it-does-not-shadow-ban-despite-complaints-by-republicans/

After President Donald Trump accused Twitter of “shadow banning” prominent Republicans, the company denied that it uses the practice, in which someone’s posts are made invisible or undiscoverable without them knowing.

In a blog post titled “Setting the record straight on shadow banning,” Vijaya Gadde and Kayvon Beykpour, Twitter’s legal and product leads, respectively, were blunt: “We do not shadow ban. You are always able to see the tweets from accounts you follow (although you may have to do more work to find them, like go directly to their profile). And we certainly don’t shadow ban based on political viewpoints or ideology.”