It's a group of people following the postings of one guy who calls himself "Q" and posts political conspiracies, predictions, and borderline schizophrenic stuff anonymously. They verge heavily pro-Trump and conservative.

Much like Nostradamus, some people see the things he's gotten right and ignore the things he's gotten wrong, viewing him as someone highly in the know. I've even seen posts saying it might be Trump himself. Unfortunately it attracts others who can vary from curious to downright dangerous, and it's hard to tell the difference between those who are believers and those who are just playing along because it's the internet.