So that the bonsai doesn't get too big. But above all so that the existing shape of the bonsai is preserved
Trees grow stronger on the top and weaker below. We have to balance the vigor to maintaining the shape
Bonsai pruning is important to improve the fine branching (ramnification) of the branches and thus the quality of the bonsai tree
If it is to be completely redesigned, the bonsai tree has to be cut in most cases
To maintain the shape of the bonsai tree and to prevent branches from weakening and dying
To remove disturbing or dead branches and shoots