docs: application groups

docs/SUMMARY.md

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     * [Debugging Deployment And Monitoring](user-guide/debugging-deployment-and-monitoring.md)
     * [Application Metrics](user-guide/creating-application/app-metrics.md) 
   * [Overview](user-guide/creating-application/overview.md)
+* [Application Groups](user-guide/application-groups/README.md)
+  * [Overview](user-guide/application-groups/overview-app-group.md)
+  * [Build and Deploy](user-guide/application-groups/app-group-build-and-deploy.md)
+  * [Configurations](user-guide/application-groups/app-group-configuration.md)
 * [Resource Browser](user-guide/resource-browser.md)   
 * [Charts](user-guide/deploy-chart/README.md)
   * [Charts Overview](user-guide/deploy-chart/overview-of-charts.md)

docs/user-guide/application-groups/README.md

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+# Application Groups
+
+In the `Application Groups` section, you will find all the applications which are created under the same environment. 
+As an example, applications with the [CD pipelines](https://docs.devtron.ai/v/v0.6/usage/applications/creating-application/cd-pipeline) deployed in the same [environment](https://docs.devtron.ai/v/v0.6/global-configurations/cluster-and-environments#add-environment) (e.g., `devtron-demo`), will be available in the same application group.
+
+![](https://devtron-public-asset.s3.us-east-2.amazonaws.com/images/application-groups/application-groups.jpg)
+
+| Fields | Description |
+| --- | --- |
+| **Environment** | The name of the environment. |
+| **Namespace** | The name of the namespace. |
+| **Cluster** | The name of the cluster. |
+| **Applications** | Number of applications created in the same environment. |
+
+You can search by using the `environment` name or you can also filter by the `cluster` name as shown in the above image.
+
+The benefits of using `Application Groups` in Devtron:
+- To trigger build pipelines for multiple applications in bulk.
+- To trigger deployment pipelines for the same environment across multiple applications in bulk.
+
+
+`Note`: Users with [super admin](https://docs.devtron.ai/v/v0.6/global-configurations/authorization/user-access#role-based-access-levels) permission can view all the applications in the `Application Groups`. Other users can view the applications in the `Application Groups` for which they have `View only` permission or higher. 

docs/user-guide/application-groups/app-group-build-and-deploy.md

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+# Build and Deploy
+
+For the applications to be built and deployed on pushing a change, the build and deployment pipelines must be set to `AUTO`. On the `Build and Deploy` section of the `Application Groups`, you can trigger build or deploy more than one application at the same time. You can also `Select all apps` to trigger build or deploy all the applications. 
+
+![](https://devtron-public-asset.s3.us-east-2.amazonaws.com/images/application-groups/build-and-deploy-app-groups.jpg)
+
+
+There are two main steps for building and deploying applications:
+
+* [Triggering CI](triggering-ci.md)
+
+* [Triggering CD](triggering-cd.md)
+
+
+## Application with pre-deployment/post deployment pipeline
+
+The application with the pre-deployment or post-deployment pipeline can also be selected by triggering:
+
+* [Trigger Pre-deployment stage](https://docs.devtron.ai/v/v0.6/usage/applications/creating-application/cd-pipeline#3.-pre-deployment-stage)
+* [Trigger Deployment](https://docs.devtron.ai/v/v0.6/usage/applications/creating-application/cd-pipeline#4.-deployment-stage)
+* [Trigger Post-deployment stage](https://docs.devtron.ai/v/v0.6/usage/applications/creating-application/cd-pipeline#5.-post-deployment-stage)
+
+
+![](https://devtron-public-asset.s3.us-east-2.amazonaws.com/images/application-groups/pre-deployment-app-groups.jpg)
+
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docs/user-guide/application-groups/app-group-configuration.md

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+# Configurations
+
+For the `Application Groups`, you can configure the following for the specific application:
+
+![](https://devtron-public-asset.s3.us-east-2.amazonaws.com/images/application-groups/configurations-app-groups.jpg)
+
+* [Deployment Template](deployment-template.md)
+
+* [Config Maps](config-maps.md)
+
+* [Secrets](secrets.md)
+
+

docs/user-guide/application-groups/applications groups.md

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+# Application Groups
+
+`Application Groups` is a new functionality in Devtron. In the `Application Groups` section, you will find all the applications which are created under the same environment. 
+As an example, if you create two applications `app-A` and `app-B` and add them in the same [environment](https://docs.devtron.ai/v/v0.6/global-configurations/cluster-and-environments#add-environment) (e.g., `devtron-demo`), you will find both the applications in the same application group (environment name). 
+
+![](https://devtron-public-asset.s3.us-east-2.amazonaws.com/images/application-groups/application-groups.jpg)
+
+| Fields | Description |
+| --- | --- |
+| **Environment** | The name of the environment. |
+| **Namespace** | The name of the namespace. |
+| **Cluster** | The name of the cluster. |
+| **Applications** | Number of applications created in the same environment. |
+
+You can search by using the `environment` name or you can also filter by the `cluster` name as shown in the above image.
+
+The benefits of using `Application Groups` in Devtron:
+- To deploy mulitple microservices.
+- To perform bulk CI/CD across multiple applciations under the same environment.
+
+`Note`: You must have a [super admin](https://docs.devtron.ai/v/v0.6/global-configurations/authorization/user-access#role-based-access-levels) permission to access all the applications in the `Application Groups`. Permission users with `admin` can access only the limited applications which they created.

docs/user-guide/application-groups/overview-app-group.md

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+# Overview
+
+The `Overview` section of the `Application Groups` contains the brief information of all the applications, application status, deployment status of the particular environment.
+
+![](https://devtron-public-asset.s3.us-east-2.amazonaws.com/images/application-groups/overview-app-groups.jpg)
+
+The following details are provided on the **Overview** page:
+
+| Fields | Description |
+| :---    |     :---       |
+| **Environment**  | Displays the name of the environment. |
+| **Namespace** | Displays the namespace. |
+| **Cluster**  | Displays the cluster name. |
+| **Application**   | Displays the list of applications created in the particular environment. |
+| **App Status**   | Displays the application status against the application. E.g., `Healthy`, `Not deployed` etc. |
+| **Deployment Status**   | Displays the deployment status of the application. |
+| **Last Deployed**   | Displays the time at which the application was last deployed. |
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