Explanation:

Box 1: Calculated
Calculated columns are calculated in real-time when they are retrieved. Calculated columns can be composed using different data types. For example, an Integer calculated column may reference values from Decimal or Currency columns.
Box 2: Simple
A simple column isn't defined as a calculated or rollup column.
Box 3: Rollup
Because rollup columns persist in the database, they can be used for filtering or sorting just like regular columns.
Reference:
https://docs.microsoft.com/en-us/powerapps/developer/data-platform/calculated-rollup-attributes