By definition, almost all questions here ask about advice. Some questions are tagged "advice", some aren't. I suggest that the "advice" tag is not useful and should be deleted.
One alternative would be to explicitly define the "advice" tag as
This is a question about giving, requesting or receiving advice.
For instance, this question could be tagged "advice" under this definition.
However, I am afraid that many users will nevertheless tag any request for advice with "advice", i.e., that the tag will have a low signal-to-noise ratio. In addition, out of the 17 questions currently tagged "advice", it seems like only the single one linked above asks for advice about giving advice, so after cleaning up useless instances of the tag, we would be left with only a single valid instance.
EDIT: And I would also propose deleting the personal-advice tag, for exactly the same reason. (Should I split this off into a separate meta question?)