Team matches are the exact same as online chess, just you're playing through a group.
When you join a team match you get two games only, both against the same person. One game where you play as white, one where you play as black. How the ratings work for if you win or lose your own games still work the same as they do for any other online chess game, but if your group wins the match, they win points for their group (which show on a leaderboard).
I have never played in a team match. I have played turn based games aka online chess.
Is a team match a set of turn based games? I know that in turn based games I can use a book to look up moves or ideas or whatever. Is it the same in team match games?
If a friend is in team match game can I advise him about a good book to use?
And by the way, I really like chess.com, but the help menus are poor.