Use location and/or content description as the basis for your App names.
By data source
Ask yourself: What is the source file called?
For integration-based apps, name the app after the original source file — it makes it much easier to identify and manage later.
If the source is a PowerPoint file, name the app after that file
If the source is a Power BI report, use the report's name — and if you're only showing filtered pages or specific sections, include that in the app name too
By location
Ask yourself: Where will this content be shown?
UK London SharePoint Local NewsSP Madrid Power BI Sales OutputAll Locations (Internal) My Content Channel
Start with a country abbreviation, followed by the city, then the content type.
By use case
Ask yourself What is the content about?
SharePoint News Global ChannelHR Teams AnnouncementsPower BI Sales Output