It is glad to have a new section called Help Center nowadays, as it can only be edited by diamond (♦) moderators, we can set up credible rules or regulations in here.
But the Help Center still lack of an important section about tagging, which seems that we are still depreciate about the moderation on tagging. So now I suggest to have a new section called tagging in the Help Center.
The new tagging section should include some fundamental instructions about tagging, and most importantly, should include some concrete tagging rules, so can we can reserve the rights about sanctions on the tagging violations users.
Questions about matrices should include the matrices tag.
Questions about algebraic equations should include the polynomials tag.
Questions about transcendental equations should include the transcendental-equations tag.
Questions about diophantine equations (equations that only interested about the integer/rational solutions) should include the diophantine-equations tag.
Questions about ODEs should include the differential-equations tag.
Questions about PDEs should include the pde tag.
Questions about integral equations should include the integral-equations tag.
Questions about indefinite integrals should include the indefinite-integral tag.
Questions about proper integrals should include the definite-integral tag.
Questions about improper integrals should include the improper-integrals tag.