Anything to do with the act of awarding a grade. This can include study, preparation, the examination itself, or teaching related to grades.
Most, if not all, martial arts have hierarchical system of grades meant to reflect a certain level of competence in said art. Most organisation do hold gradings where an examinee is asked to perform some aspect of the art and might be require to submit a written report.
In any case, this tag denotes anything related to said grading process.