I don’t understand what it’s for and it would be of great help if someone could explain it to me, because the truth is that I can’t find the explanation either in the video or in the detailed notes.
( I am actually in lesson 3 )
Thank you very much for your help 
A delimiter is used to determine what the rows and columns should be set by. For instance, say while my table is good, I have a multi-label problem where the dependant column is something like black | gray. I can pass in a delimiter of ‘|’ and it will turn it into the multi-class I want to achieve
ok , thank you very much for the help