Import Coupon Codes via .csv Questions.

Hello Everyone & Good Morning from New Jersey!
I’ve searched throughout the whole forum for 2 days before asking these questions. The dots in my brain are just not connecting like they should, so I’m hoping that maybe you can all dispel the darkness and shed a little light.
I have the .csv plugin installed and exported the list to see how I have to have my .csv file setup and where to put in information. I’ve watched the video…and it did make a little sense to me, but not to completion. Here are my questions:
1. How do I know how to make each coupon code to be properly associated with each store? I know each store has their own unique store ID number, but that’s about it. I see the categories column, but that’s it…no other association.
2. There’s a list off access numbers/code…that I don’t understand what it all means. I read that one number signifies something else…while another means something else. Do I have to worry about that column at all when importing?
3. Do I need all of these columns of information? Some of it is not necessary, from what I see, what I don’t know. I’ve been manually entering mine in. However, I now have a TON of amazing stores to put into my site and I want this to be seamless work for me. Work smarter and not harder! lol. So, I’m trying to get the basic .csv file setup for it to do what it’s supposed to do.
I’m attaching my .csv file that I exported in hopes that it will help me and you all to help me? lol

Thank you so much for any help. I’m a little lost with this one. THANK YOU!