
Explanation:
Box 1: Custom
Automatic vs. custom backups
There are two types of backups in App Service. If your app is in a supported pricing tier, automatic backups are created regularly. Custom backups require initial configuration and can be made on-demand or on a schedule.
Downloadable backups are only available for Custom backups.
Box 2: Premium P3V3
Deployment slots are a feature that allows you to deploy a new version of your application to a separate staging environment without affecting the live production environment. This feature is available in the Standard, Premium, and Isolated App Service plans.
Premium P3V3 generally offers better performance-per-cost than Isolated I3V2 due to its higher memory-to-core ratio and faster processors. The Isolated I3V2 tier is more expensive because it provides a dedicated, isolated environment within an Azure data center.
Reference:
https://learn.microsoft.com/en-us/azure/app-service/manage-backup