EAutomationTestFlags::Type

EAutomationTestFlags::Type https://docs.unrealengine.com/4.27/en-US/API/Runtime/Core/Misc/EAutomationTestFlags__Type/

The documentation has a list of test filters [SmokeFilter, EngineFilter, PerfFilter, StressFilter, NegativeFilter]

If you look through the code it is fairly easy to determine how to use SmokeFilter and NegativeFilter. However I have not been able to find any documentation or comments on why or how to use the other filters.

Are they merely labels? What is the best practice for using them and where can I find more information about them?

Thank you!