1.This maps requests for the URL /pages/home to the home action in the Pages controller.
2.The request hits the rails router which dispatches to the proper controller action. In this case, it goes to the index action in the Users controller.
3. Curly braces or do..end. It's best to use curly braces for short one-line blocks and the do..end for mult-iline blocks.
4.When the order matters, use an array.