Keith, CSS stands for Cascading Style Sheets. CSS describes how HTML elements are to be displayed on screen, paper, or in other media. CSS saves a lot of work. It can control the layout of multiple web pages all at once. External stylesheets are stored in CSS files.
Probably you want to export to a CSV? It is the same as using the export with data bindings, just run your action with app connect. I will update the videos to show App Connect, in the next few days.
Yes, sorry was referring to csv so that has caused the confusion here, seems the type correction turns 'csv' to 'css' and I have not spotted it. Will try to work out how to do that with app connect but a tutorial will obviously help as it is not always obvious how to do things in app connect.