Exactly who Q is, is not 100% known. At its most basic level, it's an anonymous poster who first started posting in 2017 on 4chan and then shifted to 8chan as the site came under attack.

It is assumed that it's a small group of intelligence/military officials at the highest levels who are working closely with Trump and have been working on this project for a very long time. Their purpose in posting was to "wake up" or enlighten a section of the populace to what was really going on behind the scenes of the world using "backchannel" anonymous networks.

When Q first started posting, what got so many people intrigued was that immediately they were posting information that connected multiple "conspiracy theories" together. Kind of like, imagine everyone knew there was corruption in government, and all of a sudden this random anonymous poster is posting direct links to companies, documents, and all sorts of other bits of information that link together what people previously had suspicions of but were never able to figure out on their own.

Around this time, Q posted a photo from an airline looking out at islands over the ocean labeled "AF1." This was when Trump was in Asia. AF1's route is never exactly published; however, anons were able to determine that the islands matched up with a likely flight path AF1 would have been on that day, the weather matched up, and the lighting matched up... again cementing in a lot of the early folk's minds that this was the real deal. Imagine how difficult it would be for a hoaxer to get a never posted photo looking out over the flight path of AF1.

These "coincidences" have only increased in frequency to the point where it's basically impossible for it to all be a hoax. There have been like 4-5 occasions where Q has made a post about 2-3 seconds BEFORE Trump puts a tweet out. Once or twice there was less than a second difference. Q was also talked about Epstein almost from the beginning, years before he was arrested. Stated that North Korea was not as it seemed before Trump met with Kim while he was still launching rockets at us.

If you're still intrigued, I would suggest going to https://Qmap.pub or https://qanon.pub and reading through Q's posts from the beginning on your own.

A lot of people get thrown off by the first few posts which talk about Hillary being arrested in October... however, most now assume those posts were disinformation and/or they may have been referring to future dates... perhaps this year. As for disinformation goes, imagine you're an agent who wants to catch a notorious drug lord and so you post on an anonymous board real information only a few people would know is true and then you add some false information like they're going to get raided the next day... that drug lord is likely to freak the fuck out and flee or make phone calls and other mistakes... and perhaps that's exactly what you want so that you can find out who they are talking to. I think that's exactly what the first Q posts were doing.

Anyways, if you wanted a TL;DR of what Q has uncovered it's basically that there exists a "shadow government" that has been controlling much of the world using blackmail to keep all its members in check. It's being taken down methodically; however, the level of corruption is on the "biblical" scale. Trump was asked to run for President to aid in this effort because there would have been no other way to take the Deep State down without control of the Presidency.