How do I find the standing of a journal or conference for an academic CV? I'm writing an academic CV for a PhD application and they have asked for the standing of journals or conferences of published articles.


  Research publications
  
  Include articles published or accepted for publication (with the three most significant marked with an asterisk).  Please specify the publication details, your contribution as an author to multi-authored publications, plus the standing of the journal or conference.


I'm really not sure what they are looking for or how to express this. Is it the impact factor of the journal? And what about conference proceedings which don't have impact factors?
Seems it isn't actually that important. I sent them an email to clarify and they replied: 


  Don’t worry too much about the standing of the journal or conference, as long as you list any publications and conferences that you have.