Hi there, Aydin! Welcome to the forums. 🙂
Unfortunately, the CSV importer does not currently support additional fields. It’s a feature we’re working on but I don’t have a timeline for its release and cannot say when it will come out.
For example, I can not import the field “Country” and “City.”
Country and City are fields for Venues rather than Events. You can import your Venues first, then import your Events with a column for the Venue they are attached to. Here’s a handy video tutorial that walks through the process.
Does this help answer your questions? Please let me know.
Cheers!
Geoff