Problem with import csv

[vendere]

Hello and thank you in advance for those who will help me in solving the problem I have. Practically everything I installed and am trying to import the products with csv import but I do not understand where to put the link to redirect the product that takes you to the vendor's site for sale I can import the products price categories whether or not the system into subcategories, but never mind my problem is figuring out where to enter the URL that shows the site of the supplier and explained that I uh hope someone can help me solve the issue through