It's a pretty big rabbit hole but it all basically surfaced with some emails that were released. Weird code names and documented FBI symbolisms were found and people on Reddit, 4Chan, and other social media platforms started stumbling across all sorts of weird stuff, between strange photos on instagram, to other suspicious things. It is truly hard to try to summarize this so here are a few links talking about it
Here is a segment Ben Swann did on it
A lot of the content has been scrubbed from the internet. The strange thing is, with as much as the main stream media labeled this fake news, it really received a lot of censorship.
Strangely enough, a good database collecting the work on all of this was just shut down today or yesterday.
WHAT IS PIZZAGATE.WIKI We are an open-source investigation organization which documents facts and sources about crimes, potential abuses of power and disinformation conducted by governments around the world. Using facts and cited sources as well as honest discussion we can collectively solve perhaps the greatest and most secret crime spree ever committed.
These days Pizzagate means a lot of different things to a lot of different people. "Pizzagate" as a meme originated from the release of John Podesta's emails  which contain unusual references to pizza, and would eventually reveal his ties to the politically well-connected pizza restaurant Comet Ping Pong . However, the investigation has since evolved into a full-blown activist movement. The mainstream media and those implicated are bombarding the subject with speculation, divisiveness, and most importantly, pure disinformation. In spite of all this, there are still serious scholars, researchers, journalists, law enforcement agencies, and governments courageously pursuing the subject.
At its core, Pizzagate is a joint investigation between citizens, law enforcement, and governments into the pervasiveness of sex trafficking, ritual abuse, and cyber crime in global political powers around the world. These investigations, some in the making for decades, continue to exist because they are based on real facts, data, and observations. Some famous examples include:
The fact that around 800,000 children are reported missing  and 300,000 children are at risk of sexual exploitation  in United States alone every year. For context, the number of people murdered in the United States in a given year is only around 16,000.
There are approximately 20 to 30 million slaves in the world today. According to the U.S. State Department, 600,000 to 800,000 people are trafficked across international borders every year, of which 80% are female and half are children.
Over 51 countries are affected by the same organizations that are subverting human rights and facilitating international human, drugs, and weapons trafficking Former Congressman Anthony Weiner - At the very least texted graphic, sexual messages to three women including a 15-year old girl 
Shortly after Weiner's laptop was seized, the largest pedophile raid in the U.S. was conducted 
Former Speaker of the House Dennis Hastert - Admitted "serial child molester" who has now been convicted 
Billionaire financier Jeffrey Epstein - International child trafficker and child molester who not only had a private island where he reportedly abused children, but also took other notable figures aboard his 727, dubbed the "Lolita Express," like Bill Clinton 
Presidio Army Base - still under FBI investigation for molestation and Satanic ritual abuse at the base's daycare center . Many other bases have been implicated and are under investigation as well, including Fort Meade .
Jimmy Savile (deceased) - Major British celebrity and politico who is being investigated for sexually abusing around 450 children  For those who are silent, never stop seeking the truth,
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