Extend explanation of beforeAll hook

src/story.ts

@@ -394,8 +394,15 @@ export type ProjectAnnotations<
   argTypesEnhancers?: ArgTypesEnhancer<TRenderer, Args>[];
 
   /**
-   * Function to be called once, before rendering any story. When the function is async, it will be awaited.
-   * A cleanup function may be returned. This function may only be defined globally.
+   * Lifecycle hook which runs once, before any loaders, decorators or stories, and may rerun when configuration changes or when reinitializing (e.g. between test runs).
+   * The function may be synchronous or asynchronous, and may return a cleanup function which may also be synchronous or asynchronous.
+   * The cleanup function is not guaranteed to run (e.g. when the browser closes), but runs when configuration changes or when reinitializing.
+   * This hook may only be defined globally (i.e. not on component or story level).
+   * When multiple hooks are specified, they are to be executed sequentially (and awaited) in the following order:
+   * - Addon hooks (in order of addons array in e.g. .storybook/main.js)
+   * - Annotation hooks (in order of previewAnnotations array in e.g. .storybook/main.js)
+   * - Preview hook (via e.g. .storybook/preview.js)
+   * Cleanup functions are executed sequentially in reverse order of initialization.
    */
   beforeAll?: BeforeAll;