As a manager, it would be particularly useful to be able to include some commentary related to a particular test suite or section, to memorialize information that related to the test cases within. Such commentary could include special account access credentials that might be needed to complete the test cases, special instructions (global preconditions), or simply "thought adjusting" overview information intended to help guide testers.
Obviously, something similar could be accomplished using the preconditions slot (or on test runs), but (again obviously) maintaining that information over time becomes much easier if it can be handled in a single, more global area that lived with the test suites themselves, rather than having to update (copy/paste) to potentially many individual test cases...and "naked" lists of test cases can sometimes not be enough to give testers the autonomy that they require (at least in my organization).
If something like this can already be accomplished, please point me in the right direction!
Thanks,
-- 2+ years using TesRail and loving it