CSGO is not a game about killing enemies, it’s a game about communicating with other people. It’s not just one player who wins the match, but the whole team through their teamwork.
To boost the effectiveness of your teamwork, players must interact with each other. Communicate as much as you can and give information about your opponents. Always speculate on what is best to do for your team if you have an opinion on the subject.
The team that communicates and helps each other most often wins.