Difference between uploading csvs and json files to Plone instance

I've been trying to use transmogrify.dexterity to upload csv files to my Plone instance. I think that I'm supposed to write a .cfg file like this example (which is for json) but i'm not sure how to change it to upload csvs. Also, I don't know how to compile it using Plone. Do I just run ./bin/build form my zinstance folder? Finally, where would I check to see if my upload worked?

Sorry, I know these are a lot of questions. I'm new to Plone and would appreciate answers to any of these three questions. Thanks!