Docs > Tutorial > Improve discoverability of manualChunks for code …

…splitting (#3631)

* Improve discoverability of `manualChunks` for code splitting

* Action a review comment - change 'late' to 'lazy'

Remark from [this comment](#3631 (review))

plus a minor improvement of precision in the parenthesis describing what it is.

docs/04-tutorial.md

@@ -282,7 +282,9 @@ var version=function(){"use strict";var n="1.0.0";return function(){console.log(
 
 ### Code Splitting
 
-To use the code splitting feature, we go back to the original example and modify `src/main.js` to load `src/foo.js` dynamically instead of statically:
+For code splitting, there are cases where Rollup splits code into chunks automatically, like dynamic loading or multiple entry points, and there is a way to explicitly tell Rollup which modules to split into separate chunks via the [`manualChunks`](guide/en/#manualchunks) option.
+
+To use the code splitting feature to achieve the lazy dynamic loading (where some imported module(s) is only loaded after executing a function), we go back to the original example and modify `src/main.js` to load `src/foo.js` dynamically instead of statically:
 
 ```js
 // src/main.js