Cross-App Fiori Navigation is a feature in SAP Fiori that allows users to navigate between different SAP Fiori apps seamlessly, without the need to close one app and open another. It enables users to access information from different apps and combine it to perform complex tasks efficiently.

Cross-App Fiori Navigation uses deep links, which are URLs that point directly to a specific page within an app. When a user clicks on a deep link in one app, it automatically opens the target app and navigates to the specific page, without the user needing to perform any additional actions.

Overall, Cross-App Fiori Navigation improves the user experience and productivity by providing a seamless and integrated experience across different SAP Fiori apps.