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Log in to your Jira instance as an admin.
Navigate to Jira settings > Apps.
Select Find new apps from the sidebar, and navigate to Atlassian Marketplace for Jira page.
Locate the app using search and click Roll-Up Reports for Jira tile.
Click Get app to start installing the app.
The Add to Jira installation window opens, click Get it now.
Once the app installation is complete, a Success message box is displayed.
Click Manage app, and you can view the app listed under User-installed apps. To learn more about the app, click Documentation.
To start using the app, navigate to Jira > Apps > Roll-Up.
References
To quickly get started with the app, refer to the following: