How to format CSV for import?

Found a blog about it!

https://www.v9seo.com/blog/2013/07/08/how-to-import-with-the-wordpress-plugin-redirection/

Actually, belay that order. It didn’t upload them correctly. Should I be using a particular flavour of CSV to make it work?

use this:
Source URL, Target URL, [Regex 0=false, 1=true], [HTTP Code]
save list as .csv

example:
https://mydomain.id/scopus-list/5300152732,https://www.targetdomain.com/sourceid/5300152732,1,301
https://mydomain.id/scopus-list/29949,https://www.targetdomain.com/sourceid/29949,1,301
https://mydomain.id/scopus-list/19700188320,https://www.targetdomain.com/sourceid/19700188320,1,301

Hello
I see that on the latest version of your plugin you have changed the import format from CSV to Source URL, Target URL, [Regex 0 = false, 1 = true], [HTTP Code]
Can you explain to me what “[Regex 0 = false, 1 = true]” and what I have to put. The site I’m dealing with at a lot of 301 final redirection and so far I was importing CSV in this format “Source URL, Target URL, Hit” I have a hundred to import and I’m afraid to do errors :/
Can you help me please ?
cordially
Niko