
Explanation
Graphical user interface, text, application, chat or text message Description automatically generated

Box 1: Autonumber column
Autonumber columns are columns that automatically generate alphanumeric strings whenever they are created.
Box 2: Business rule
By combining conditions and actions, you can do any of the following with business rules:
Enable or disable columns
Set column values
Clear column values
Set column requirement levels
Show or hide columns
Validate data and show error messages
Create business recommendations based on business intelligence.
Reference:
https://docs.microsoft.com/en-us/powerapps/maker/data-platform/autonumber-fields
https://docs.microsoft.com/en-us/powerapps/maker/data-platform/data-platform-create-business-rule