Query on pages and posts to be protected

Hello, I have just installed the plugin and have configured my general settings. Now I am in my pages and posts - I have created these previous to downloading the plug in.

I see on the pages & posts how to set a unit price to make each page content protected.

But my question is this. I want to charge pay per view for the whole site so am I still meant to fill in the unit price? And if so with what information?