Here you can define a black- or a whitelist. All apps on the blacklist will be blocked. All apps which are not in the whitelist, will be blocked. An empty blacklist blocks nothing, while an empty whitelist blocks everything*

*All mandatory apps and apps from the Enterprise App Store will be whitelisted automatically. You don’t need to add them manually

When clicking on the “+” you can either search for an app you want to add to your black- or whitelist or enter a package name manually.