docs: revised build custom features chapter

www/apps/book/app/learn/customization/custom-features/page.mdx

@@ -4,22 +4,24 @@ export const metadata = {
 
 # {metadata.title}
 
-In this chapter, you'll learn about the concepts you need to build custom features in your Medusa application.
+In the upcoming chapters, you'll follow step-by-step guides to build custom features in Medusa. These guides gradually introduce Medusa's concepts to help you understand what they are and how to use them.
 
-To add a custom feature to your application, you create:
+By following these guides, you'll add brands to the Medusa application that you can associate with products.
 
-1. A module with data models and a main service to manage them.
-2. A workflow to create, update, and delete records of data models. You implement functionalities in a workflow to benefit from features such as roll-back in case of errors, retry configurations, and more.
-3. An API route that exposes the workflow's functionality to clients, such as the storefront or admin dashboard.
+To build a custom feature in Medusa, you need three main ingredients:
+
+- [Module](../../basics/modules/page.mdx): a re-usable package that defines commerce functionalities for a single domain. It defines new tables to add to the database, and a class of methods to manage these tables.
+- [Workflow](../../basics/workflows/page.mdx): a special function that performs a task in a series of steps with advanced features like roll-back mechanism and retry configurations. The steps of a workflow use functionalities implemented by modules.
+- [API route](../../basics/api-routes/page.mdx): a REST endpoint that exposes commerce features to clients, such as the admin dashboard or a storefront. The API route executes a workflow that implements the commerce feature using modules.
 
 ![Diagram showcasing the flow of a custom developed feature](https://res.cloudinary.com/dza7lstvk/image/upload/v1725867628/Medusa%20Book/custom-development_nofvp6.jpg)
 
 ---
 
 ## Next Chapters: Brand Module Example
 
-In the next chapters, you'll follow an example to:
+The next chapters will guide you to:
 
-1. Add a Brand Module that creates a `Brand` data model and provides data-management features.
+1. Build a Brand Module that creates a `Brand` data model and provides data-management features.
 2. Add a workflow to create a brand.
 3. Expose an API route that allows admin users to create a brand using the workflow.

www/apps/book/generated/edit-dates.mjs

@@ -94,7 +94,7 @@ export const generatedEditDates = {
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   "app/learn/customization/extend-models/extend-create-product/page.mdx": "2024-09-30T08:43:53.134Z",
-  "app/learn/customization/custom-features/page.mdx": "2024-09-12T11:18:13.271Z",
+  "app/learn/customization/custom-features/page.mdx": "2024-11-28T08:21:55.207Z",
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   "app/learn/customization/customize-admin/widget/page.mdx": "2024-10-07T12:44:24.538Z",