Fusion apps provide tailored search functionality to specific groups of users.
An app is a named set of linked objects, including collections, datasources, index and query pipelines, index and query profiles, parsers, and more. You can define security on a per-app basis using roles and security realms.
Generally, you will create multiple apps for different purposes. You can view all of your apps in the launcher when you log in to the Fusion UI:
To enter the Fusion workspace for any app, click the app name.
In the Fusion workspace, you can hover over the top left corner to switch to another app, create a new app, or return to the launcher: