Step description update (#59)

* Update step.yml

* Update step.yml

* Update step.yml

step.yml

@@ -1,13 +1,33 @@
 title: Install missing Android SDK components
-summary: Install missing Android SDK components
+summary: Install Android SDK components that are required for the app.  
+
 description: |-
-  This step makes sure that required Android SDK components (platforms and build-tools) are installed.
 
-  The step runs the `gradlew dependencies` command.
+  This Step makes sure that required Android SDK components (platforms and build-tools) are installed. To do so, the Step runs the `gradlew dependencies` command. 
+  
+  If the Android Plugin for Gradle version is 2.2.0 or higher, the plugin will download and install the missing components during the Gradle command.  
+  Otherwise the command fails and the Step parses the command's output to determine which SDK components are missing and installs them.
+
+  ### Configuring the Step
+
+  1. Set the path of the `gradlew` file.
+
+     The default value is that of the $PROJECT_LOCATION Environment Variable.
+
+  1. If you use an Android NDK in your app, set its revision in the **NDK Revision** input.
+
+  ### Troubleshooting
+
+  If the Step fails, check that your repo actually contains a `gradlew` file. Without the Gradle wrapper, this Step won't work.
+
+  ### Useful links
+
+  [Installing an additional Android SDK package](https://devcenter.bitrise.io/tips-and-tricks/android-tips-and-tricks/#how-to-install-an-additional-android-sdk-package)
 
-  If the _Android Plugin for Gradle_ version is 2.2.0 or higher, the plugin will download and install the missing components during the Gradle command.
+  ### Related Steps
 
-  Otherwise the command will fail, the step parses the command's output to determine which SDK components are missing and installs them.
+  * [Android SDK Update](https://www.bitrise.io/integrations/steps/android-sdk-update)
+  * [Install React Native](https://www.bitrise.io/integrations/steps/install-react-native)
 website: https://github.com/bitrise-steplib/steps-install-missing-android-tools
 source_code_url: https://github.com/bitrise-steplib/steps-install-missing-android-tools
 support_url: https://github.com/bitrise-steplib/steps-install-missing-android-tools/issues