The Stack Apps topic help makes it clear that all questions here must pertain to Stack Exchange in some way:
If your question is about …
- the Stack Exchange API
- applications built on the Stack Exchange API
- scripts or browser extensions that work with Stack Exchange sites
… it is welcome here.
Please look around to see if your question has been asked before. It’s also OK to ask and answer your own question. ...
(Emphasis added)
Meanwhile the stack-exchange tag has 24 questions and no tag wiki.
Looking at the current questions, it seems to me that stack-exchange adds no value to those questions.
Compare to related tags like stackapps, stackoverflow, network-profile(not yet needed here but used on Meta Stack Exchange) -- which potentially can be used for searchingSearching/filteringFiltering/classifyingClassifying questions in a useful way.
So, should we remove the stack-exchange tag?
If you say no, then please also suggest a useful tag excerpt.