Hi Robert,

those are the verbosity levels for debugging

https://developer.servicenow.com/app.do#!/event/creatorcon18/CCW1352/creatorcon_18_CCW1352_exercise_3_logging__debugging

https://community.servicenow.com/community?id=community_question&sys_id=bd71cb29db98dbc01dcaf3231f9619c6

https://www.servicenowelite.com/blog/2018/9/18/logging-for-scoped-applications

Mark Correct if this solves your issue and also mark Helpful if you find my response worthy based on the impact.
Thanks
Ankur