What is a Module , and what does it contain?

In Angular, a module, often referred to as an NgModule, is a fundamental organizational block that serves as a container for a cohesive block of code dedicated to a specific application domain, a workflow, or a closely related set of capabilities. It is a way to group components, directives, pipes, and services that are related to the application's functionality, making the code more modular, reusable, and maintainable[9].

A module is defined using the @NgModule decorator, which identifies the module class and provides metadata that determines how to compile a component's template and how the injector at runtime should be configured. This metadata can include declarations, imports, exports, providers, and bootstrap components[1][9].

Here's what a module typically contains:

• Declarations: This is where you declare the components, directives, and pipes that belong to the module. By declaring these classes, you tell Angular which components or directives are in the module, making them available for use within the module's templates[1][9].

• Imports: This section is used to import other modules and their exported classes, which are needed by the components in the current module. For example, if your components use Angular's built-in directives, you would import CommonModule here[1][9].

• Exports: Modules can export components, directives, pipes, and modules so that other modules can use them. When you export something, it means you're making it available for use in the templates of other modules[9].

• Providers: This is where you list the services that this module will provide. These services become available for injection throughout the application (provided the module is imported). However, it...