Magna works as a tree where you can put together the functionality of your webpage like lego blocks. Instead of having functionality tied to specific modules you can add functionality to pages based on functionality required using plugins.
Rather than having a method on a Blog object to submit a comment form, you can have an abstract plugin that will submit any form with ajax and handle it's response, this code can be shared throughout your application reducing the amount of code you need to write and more importantly read and maintain.
The tree is bound together by Promise's so if you need to do something asynchronously you can delay the tree with any request you need. The tree will pass a message down to every node where you can easily decide which nodes should initialize.
Node
Root
/ \
Predicate Predicate
/blog /catalogue
/ \
Import Import
#blog #catalogue
/ \
Module Module
Blog Catalogue
/ / \
Module Plugin Plugin
Post AddToCart ExpressionOfInterest
/ \
Plugin Plugin
Comment Search