diff --git a/packages/common/http/src/module.ts b/packages/common/http/src/module.ts
index be0a79fb54..ff06059d2f 100644
--- a/packages/common/http/src/module.ts
+++ b/packages/common/http/src/module.ts
@@ -76,7 +76,7 @@ export function jsonpCallbackContext(): Object {
 }
 
 /**
- * An NgModule that adds XSRF protection support to outgoing requests.
+ * Configures XSRF protection support for outgoing requests.
  *
  * For a server that supports a cookie-based XSRF protection system,
  * use directly to configure XSRF protection with the correct
@@ -132,10 +132,11 @@ export class HttpClientXsrfModule {
 }
 
 /**
- * An NgModule that provides the `HttpClient` and associated services.
+ * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`
+ * with supporting services for XSRF. Automatically imported by `HttpClientModule`.
  *
- * Interceptors can be added to the chain behind `HttpClient` by binding them
- * to the multiprovider for `HTTP_INTERCEPTORS`.
+ * You can add interceptors to the chain behind `HttpClient` by binding them to the
+ * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.
  *
  *
  */
@@ -150,7 +151,8 @@ export class HttpClientXsrfModule {
     }),
   ],
   /**
-   * The module provides `HttpClient` itself, and supporting services.
+   * Configures the [dependency injector](guide/glossary#injector) where it is imported
+   * with supporting services for HTTP communications.
    */
   providers: [
     HttpClient,
@@ -165,10 +167,13 @@ export class HttpClientModule {
 }
 
 /**
- * An NgModule that enables JSONP support in `HttpClient`.
+ * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`
+ * with supporting services for JSONP.
+ * Without this module, Jsonp requests reach the backend
+ * with method JSONP, where they are rejected.
  *
- * Without this module, Jsonp requests will reach the backend
- * with method JSONP, where they'll be rejected.
+ * You can add interceptors to the chain behind `HttpClient` by binding them to the
+ * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.
  *
  *
  */
diff --git a/packages/common/src/common_module.ts b/packages/common/src/common_module.ts
index 07c1557836..4dda41c007 100644
--- a/packages/common/src/common_module.ts
+++ b/packages/common/src/common_module.ts
@@ -16,8 +16,15 @@ import {COMMON_PIPES} from './pipes/index';
 // Note: This does not contain the location providers,
 // as they need some platform specific implementations to work.
 /**
- * The module that includes all the basic Angular directives like {@link NgIf}, {@link NgForOf}, ...
+ * Exports all the basic Angular directives and pipes,
+ * such as `NgIf`, `NgForOf`, `DecimalPipe`, and so on.
+ * Re-exported by `BrowserModule`, which is included automatically in the root
+ * `AppModule` when you create a new app with the CLI `new` command.
  *
+ * * The `providers` options configure the NgModule's injector to provide
+ * localization dependencies to members.
+ * * The `exports` options make the declared directives and pipes available for import
+ * by other NgModules.
  *
  */
 @NgModule({
diff --git a/packages/core/src/application_module.ts b/packages/core/src/application_module.ts
index 4cbd10b24b..8d9d32de63 100644
--- a/packages/core/src/application_module.ts
+++ b/packages/core/src/application_module.ts
@@ -32,6 +32,10 @@ export function _localeFactory(locale?: string): string {
   return locale || 'en-US';
 }
 
+/**
+ * A built-in [dependency injection token](guide/glossary#di-token)
+ * that is used to configure the root injector for bootstrapping.
+ */
 export const APPLICATION_MODULE_PROVIDERS: StaticProvider[] = [
   {
     provide: ApplicationRef,
@@ -56,8 +60,12 @@ export const APPLICATION_MODULE_PROVIDERS: StaticProvider[] = [
 ];
 
 /**
- * This module includes the providers of @angular/core that are needed
- * to bootstrap components via `ApplicationRef`.
+ * Configures the root injector for an app with
+ * providers of `@angular/core` dependencies that `ApplicationRef` needs
+ * to bootstrap components.
+ *
+ * Re-exported by `BrowserModule`, which is included automatically in the root
+ * `AppModule` when you create a new app with the CLI `new` command.
  *
  * @experimental
  */
diff --git a/packages/forms/src/form_providers.ts b/packages/forms/src/form_providers.ts
index 60db1042cf..56f7f42bf9 100644
--- a/packages/forms/src/form_providers.ts
+++ b/packages/forms/src/form_providers.ts
@@ -13,8 +13,9 @@ import {RadioControlRegistry} from './directives/radio_control_value_accessor';
 import {FormBuilder} from './form_builder';
 
 /**
- * @description
- * An `NgModule` that registers the directives and providers for template-driven forms.
+ * Exports the required providers and directives for template-driven forms,
+ * making them available for import by NgModules that import this module.
+ * @see [Forms](guide/forms)
  *
  * @see [Forms Guide](/guide/forms)
  */
@@ -44,8 +45,9 @@ export class FormsModule {
 }
 
 /**
- * @description
- * An `NgModule` that registers the directives and providers for reactive forms.
+ * Exports the required infrastructure and directives for reactive forms,
+ * making them available for import by NgModules that import this module.
+ * @see [Forms](guide/reactive-forms)
  *
  * @see [Reactive Forms Guide](/guide/reactive-forms)
  *
diff --git a/packages/platform-browser/animations/src/module.ts b/packages/platform-browser/animations/src/module.ts
index 39ad025556..c8d23224c3 100644
--- a/packages/platform-browser/animations/src/module.ts
+++ b/packages/platform-browser/animations/src/module.ts
@@ -11,7 +11,9 @@ import {BrowserModule} from '@angular/platform-browser';
 import {BROWSER_ANIMATIONS_PROVIDERS, BROWSER_NOOP_ANIMATIONS_PROVIDERS} from './providers';
 
 /**
- * @experimental Animation support is experimental.
+ * Exports `BrowserModule` with additional [dependency-injection providers](guide/glossary#provider)
+ * for use with animations. See [Animations](guide/animations).
+ * @experimental
  */
 @NgModule({
   exports: [BrowserModule],
@@ -21,7 +23,8 @@ export class BrowserAnimationsModule {
 }
 
 /**
- * @experimental Animation support is experimental.
+ * A null player that must be imported to allow disabling of animations.
+ * @experimental
  */
 @NgModule({
   exports: [BrowserModule],
diff --git a/packages/platform-browser/src/browser.ts b/packages/platform-browser/src/browser.ts
index 6da3936936..87a0cdb67d 100644
--- a/packages/platform-browser/src/browser.ts
+++ b/packages/platform-browser/src/browser.ts
@@ -89,7 +89,11 @@ export const BROWSER_MODULE_PROVIDERS: StaticProvider[] = [
 ];
 
 /**
- * The ng module for the browser.
+ * Exports required infrastructure for all Angular apps.
+ * Included by defaults in all Angular apps created with the CLI
+ * `new` command.
+ * Re-exports `CommonModule` and `ApplicationModule`, making their
+ * exports and providers available to all apps.
  *
  *
  */
@@ -103,9 +107,12 @@ export class BrowserModule {
   }
 
   /**
-   * Configures a browser-based application to transition from a server-rendered app, if
-   * one is present on the page. The specified parameters must include an application id,
-   * which must match between the client and server applications.
+   * Configures a browser-based app to transition from a server-rendered app, if
+   * one is present on the page.
+   *
+   * @param params An object containing an identifier for the app to transition.
+   * The ID must match between the client and server versions of the app.
+   * @returns The reconfigured `BrowserModule` to import into the app's root `AppModule`.
    *
    * @experimental
    */