Twitter confirmed the move itself in a lengthy Twitter thread:

QAnon grew from the Pizzagate conspiracy theory that Hillary Clinton was running a child sex ring out of a pizza restaurant.

It is a movement borne of the claims of the anonymous ‘Q’, “who claims knowledge of a secret cabal of powerful pedophiles and sex traffickers” according to The Guardian. Its theories are wide-ranging and include the assertion that Donald Trump is secretly bringing down this activity with his erratic presidency.

Twitter’s confident move to ban QAnon activity on its platform shows far more action than Facebook, where conspiracy theories tend to blossom unchallenged by any kind of rational moderation. Twitter’s move is presumably to counteract misinformation particularly in the Presidential Election run-in.

While the move has been met positively, it remains to be seen how effectively Twitter can police its own rules.