1, the classification of knowledge points can make you clearly know the purpose of each knowledge point and the internal relationship between them.

2. He can help you accurately grasp the key points and difficulties in the book and deepen your understanding and application of various knowledge points.

3. Especially after finishing a problem, learn to summarize the knowledge points used in this problem, so that you can quickly judge which knowledge points to use to solve this problem when you encounter this kind of problem next time.