The basic idea is to at least through the comments to express your opinion about the resume or vacancies. And to encourage the writer of a vacancy / resume to gain experience, invaluable, by the way. For example, I learned how to look for a job when it already ceased to be relevant to me.
For example, in one of the resumes I read a line of work experience “IT outsourcing”. Now in Russia, IT is called everything that is related to a computer. Therefore, such an experience of writing is short-sighted - most likely, resumes will be closed after this line, as I did.