docs: various improvements and fixes (#14257)

www/apps/resources/app/commerce-modules/page.mdx

@@ -8,7 +8,7 @@ export const metadata = {
 
 In this section of the documentation, you'll find guides and references related to Medusa's Commerce Modules.
 
-A Commerce Module provides features for a commerce domain within its service. The Medusa application exposes these features in its API routes to clients.
+A Commerce Module provides features for a commerce domain within its service. When you install the Medusa application, all Commerce Modules are available out-of-the-box. The Medusa application exposes their features in its core API routes to clients.
 
 A Commerce Module also defines data models, representing tables in the database. The Medusa Framework and tools allow you to extend these data models to add custom fields.
 
@@ -97,6 +97,6 @@ A Commerce Module also defines data models, representing tables in the database.
 
 The Commerce Modules can be used in many use cases, including:
 
-- Medusa Application: The Medusa application uses the Commerce Modules to expose commerce features through the REST APIs.
+- Medusa Application: The Medusa application comes with all Commerce Modules pre-installed and configured. Their commerce features are exposed through REST APIs.
 - Serverless Application: Use the Commerce Modules in a serverless application, such as a Next.js application, without having to manage a fully-fledged ecommerce system. You can use it by installing it in your Node.js project as an NPM package.
 - Node.js Application: Use the Commerce Modules in any Node.js application by installing it with NPM.

www/apps/resources/app/commerce-modules/store/page.mdx

@@ -29,7 +29,7 @@ Learn more about why modules are isolated in [this documentation](!docs!/learn/f
 ## Store Features
 
 - [Store Management](/references/store/models/Store): Create and manage stores in your application.
-- [Multi-Tenancy Support](/references/store/models/Store): Create multiple stores, each having its own configurations.
+- [Multi-Tenancy Support](/references/store/models/Store): While Medusa doesn't natively support multi-tenancy, the Store Module allows you to create and manage multiple stores within a single Medusa instance. You can then build customizations to link products, customers, orders, and other resources to specific stores.
 
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