Titled “Report on investigation into Russian interference in the 2016 presidential election,” the Mueller report has been anticipated for months, and it's finally out. You can download it for your reading here. The PDF is 139 megabytes, 448 pages long and from the looks at the table of contents, it's a very detailed report that covers many different territories.
A few particular sections in the report called “Russian hacking and dumping operations,” “Trump campaign and the dissemination of hacked materials” and “Russian government links to and contacts with the Trump campaign” give more specific insight to the uses of online platforms and data. There is also a section called “Russian ‘Active Measures' social media campaigns”, which talks about how it operated in the US via Twitter and Facebook.
Here is a statement from the Trump campaign (via CNN):
“President Trump has been fully and completely exonerated yet again. Now the tables have turned, and it’s time to investigate the liars who instigated this sham investigation into President Trump, motivated by political retribution and based on no evidence whatsoever. There is simply no denying that ‘spying did occur’ on the Trump campaign during the 2016 election, as Attorney General Barr himself noted in testimony before Congress. Barr went on to testify that there was a ‘failure among a group of leaders there at the upper echelon [of the FBI]… [and] I feel I have an obligation to make sure that government power is not abused.’ Now that the collusion and obstruction conspiracy theories have been exposed for the pathetic hoaxes they always were, the Obama-era DOJ and FBI must answer for their misdeeds and the scam that they perpetrated against the American people. Justice will be served.”
The 448 page-long document provides an exhaustive look into all the events related to interference in 2016 presidential elections, including a June 9th 2016 meeting at Trump Tower, events at the RNC and connections between the Russian government and members of Trump's campaign after the election took place. There's also details about individuals like Carter Page, George Papadopoulos and Paul Manafort. All of these individuals worked on Trump's campaign and appeared to have interaction or ties to Russia.