I watched this video on youtube http://www.youtube.com/watch?v=OWzvLXzTPIk
I think I don't have a content delivery network, in fact I really dont know what one is. I use hostgator to host my wordpress blog and I assumed that since my images and everything are all stored there that they are my Content Delivery Network but apparently not.
So after watching that video I have my General Settings set like this:
Page Cache: enable is checked, disk (enhanced)
Minify: enable is checked, disk
Database Cache: unchecked
Object Cache: enable is checked, disk
Content Delivery Network: unchecked
Browser Cache: enable is checked
I wish these plugins came with walkthru vids for dipshits like me.