What does the XUnit [Task] annotation do?

I noticed that many of the tests in the C# track are marked with a [Task(n)] annotation. I’ve done some searching but can’t seem to find anything that describes what this does.

What is this annotation used for?

That annotation is used in the test file to group tests into task groups in concept exercises.

See this example from the Cars Assemble concept exercise.

That makes sense. Thank you!