Twitter. It will be a monthly tournament spanning three weeks for European and North American regions with a total prize pool of 2,200 USD. All players will be divided into several divisions, and the top four from Elite Division in each region will take a total of 1,000 USD. The winner of Challenger Division will be awarded 100 USD, and loot box codes are rewarded to 2nd-4th place finishers.The sign ups are currently open. The first games will start on 17:00 UTC, 25 Apr 2018 for European region and on 02:00 UTC, 26 Apr 2018 for the North American region.
All players and streamers are currently gathering on the
official Discord channel, this will make it easier for players to find their weekly opponents and start their games. All of the matches will be broadcast via the official 
QuakeChampions twitch channel.
Links: Rules, Coverage Rules, Player Application Form,
Discord, Twitter, Twich