Edited "Starting" Section

docs/guide/start-gii.md

 Generating Code with Gii
 ========================
 
-In this section, we will describe how to use [Gii](tool-gii.md) to automatically generate the code
-that implements some common features. To achieve this goal, all you need is just to enter the needed
-information according to the instructions showing on the Gii Web pages.
+This section will describe how to use [Gii](tool-gii.md) to automatically generate  code
+that implements some common Web site features. Using Gii to auto-generate code is simply a matter of entering the right information per to the instructions shown on the Gii Web pages.
 
-Through this tutorial, you will learn
+Through this tutorial, you will learn how to:
 
-* How to enable Gii in your application;
-* How to use Gii to generate an Active Record class;
-* How to use Gii to generate the code implementing the CRUD operations for a DB table.
-* How to customize the code generated by Gii.
+* Enable Gii in your application
+* Use Gii to generate an Active Record class
+* Use Gii to generate the code implementing the CRUD operations for a DB table
+* Customize the code generated by Gii
 
 
 Starting Gii <a name="starting-gii"></a>
 ------------
 
-[Gii](tool-gii.md) is provided by Yii in terms of a [module](structure-modules.md). You can enable Gii
-by configuring it in the [[yii\base\Application::modules|modules]] property of the application. In particular,
-you may find the following code is already given in the `config/web.php` file - the application configuration,
+[Gii](tool-gii.md) is provided in Yii as a [module](structure-modules.md). You can enable Gii
+by configuring it in the [[yii\base\Application::modules|modules]] property of the application. Depending upon how you created your application, you may find the following code is already provided in the `config/web.php` configuration file:
 
 ```php
 $config = [ ... ];
@@ -30,16 +28,16 @@ if (YII_ENV_DEV) {
 ```
 
 The above configuration states that when in [development environment](concept-configurations.md#environment-constants),
-the application should include a module named `gii` which is of class [[yii\gii\Module]].
+the application should include a module named `gii`, which is of class [[yii\gii\Module]].
 
 If you check the [entry script](structure-entry-scripts.md) `web/index.php` of your application, you will
-find the following line which essentially makes `YII_ENV_DEV` to be true.
+find the following line, which essentially makes `YII_ENV_DEV` to be true.
 
 ```php
 defined('YII_ENV') or define('YII_ENV', 'dev');
 ```
 
-Therefore, your application has already enabled Gii, and you can access it via the following URL:
+Thanks to that line, your application is in development mode, and will have already enabled Gii, per the above configuration. You can now access Gii via the following URL:
 
 ```
 http://hostname/index.php?r=gii