ESEA is a professional gaming platform supports many CS:GO official tournaments. For use coach features in a game with your team of squad you just need to put this in chat and press enter:


You can get more information straight from ESEA Website: Join as coach in ESEA [support.esea.net]

Or watch the tutorial on YouTube:
https://www.youtube.com/watch?v=ZguFqn1OO4Q&feature=emb_title