One of the main advantages of Power BI apps is their isolation from app workspaces. The members of the app workspace can continue to develop, test, and modify content in the app workspace while users only view the latest published app. This single level of built-in staging could be a sufficient alternative for some teams and projects relative to the multiple workspaces (Dev, Test, Prod) involved in a staged deployment life cycle, as described in Chapter 8, Managing Application Workspaces and Content.

After an app has been published, the Publish app icon in the top-right corner of the app workspace will be changed to an Update app icon, as shown in the following screenshot:

In the preceding screenshot, the ellipsis (three dots) to the right of the Update app icon has been selected from the context of the administrator for the workspace administrator. In addition to the options to edit and leave the workspace, an Unpublish App option exists to immediately remove user access to the published app. Workspace members (non-admins) can also unpublish the app and execute app updates. 

Clicking Update app launches the same three pages (Details, Content, Access) described in the Publishing apps section. In the most common update scenarios, such as adding a new report or modifying a dashboard, it's unnecessary to change any of these settings and the Update app icon can be clicked a second time. However, these pages enable fundamental modifications to be implemented, including the users or groups with permission to access the app and the default landing page for the app.