Training is a room where you can practice your shaman skills by yourself. It can be accessed by clicking Menu and then Training. You are then moved to a room according to your username, "Training Username#tag". For example if Tigrounette went into his Training room, it would be "Training Tigrounette#0001". However, the room is not private, as other people can join your training room.
In this room, the objective is to get the cheese and to the hole like a normal map, however you will not receive the cheese in the shop or as a save, neither will it give you experience. This is to pass a round in training mode. Training is made for beginners or anybody who wants to practice their Transformice skills.