Q. What is a Skill Group?
A. Like an Elo rating in Chess, the CS:GO competitive Skill Groups predict how well players will perform when playing against other players. Two equally skilled teams should, on average, win an equal number of matches when competing against each other.
A. No. Firstly, the matchmaking system will take your lower-skilled friend into consideration when finding a match. And second, the system makes a prediction about how well each team member will perform in a match. So losing a match with a lower skilled player on your team is not likely to significantly impact your Skill Group. If you always play your best then your Skill Group will provide you with well matched teammates and opponents. The csgo ranking system is very good!
A. When you play your first game, we have no idea what your skill is. As you play more games, we use those wins and losses to make predictions about what Skill Group we think you should be in. The more games you play, the more confident the system is in predicting who the other players are that you should be playing against. Winning 10 games gives us enough data to confidently place you in a Skill Group where we think you’ll be matched up with others matching your skill level.