Why does Ethereum need KZG10 commitments?

(Translator's note: The technology introduced in this article is generally called "KZG10 commitment" in the cryptography community, named after the first letters of the three authors' surnames in the paper. However, when introduced in the Ethereum ecosystem, it was simplified to "Kate commitment," and even core developers call it this way. This is disrespectful to the other two authors and should not continue. In this translation, wherever the original author uses "Kate commitment," it is uniformly translated as "KZG10 commitment.")