I noticed that the definition of the tag professors is:
Queries related to professors, a highly accomplished and recognized academic and an expert in their respective discipline.
I don't really like this definition because it seems to be (1) aggrandizing and (2) focused on tenured professors at research universities. Not all professors (ranked or adjunct) at the liberal arts college at which I teach are experts in their respective disciplines. The description is even less accurate for (most) community college professors.
While I know I could edit the tag myself, it seemed worth consulting the community for such an important tag.
As a starting point for discussion, here is a draft of an alternative definition:
Queries relating to professors, [faculty] members whose job responsibilities may include [research], [teaching], and [service-activities]. See also [assistant-professor], [associate-professor], and [professor-emeritus].
Here is an improved definition, replacing "faculty" with "academic staff" (per @Anyon's comment) and removing references to other tags, which I have since learned do not belong in tag usage guidance:
Queries relating to professors, academic staff members whose job responsibilities may include research, teaching, and service.
I have made the edit.