'x min' means that each player has that number of minutes to makes all of their moves for the entire game. If their time runs out, they lose.
'x|y' means that they have x minutes, like above, but each move y seconds are added to their remaining time, so that you are never left with .1 of a second to make a move.
what do all the different game times mean?
10 min, 5I2, 15I10, 30min, 5min, 3min, 2I1, 1min???