The text discusses the importance of code splitting in React applications, especially when dealing with large code bases and mobile devices. It explains how to use the Code Split technique to split the code into smaller chunks and load them only when needed, reducing the initial bundle size and improving performance. The article provides a step-by-step guide on how to implement code splitting using `React.lazy` and `Suspense`, along with tools like `source-map-explorer` to analyze and optimize the bundle. By doing so, developers can improve their application's speed, reduce data consumption, and enhance user experience.