10 min game means that each player has 10 minutes for the entire game.
15|10 means that each player has 15 minutes for the entire game and that 10 seconds are added to a player's clock every time he makes a move.
You can read more about it here:
http://support.chess.com/Knowledgebase/Article/View/93/13/how-do-the-time-controls-work-in-the-live-chess
What are different formats of the game on this site?
for example, what is a 10 min game? Is the total l=time of the game is 10 mins? Similarily, what's a 15/10 or 5/2 game?
Please help, I lost some of the games because I didn't know how soon to make a move.