Rails for Beginners Part 6: The Root Route Discussion

I created a guide for myself based on this video:
https://paper.dropbox.com/doc/6-How-to-add-the-root-route--BFkHqiwUkuyuvDGJuGbMgiZqAQ-snEyAhwuCkHFOSGR2s0f6

Another shortcut to the root route is that you can drop the to:
root: "main#index"