This is the image that’s been going around:
This is apparently what Twitter employees see when they look at someone’s account. This account, the details of which have been redacted, is apparently on a “trends blacklist” and a “search blacklist.”
So Twitter can “blacklist” accounts that it doesn’t want to show up when searched, and it also apparently prevents certain things from trending.
Most people on the right have long suspected that Twitter does this and has been doing it for a long time, but now it’s confirmed.