Going deeper into Backbone.js, it provides an MVC-like (Model-View-Controller) structure which helps to organize your JavaScript code in a structured manner. Models in Backbone.js allow you to abstract your data into models, encapsulating data and business logic. This gives you a clean and structured way of handling data. Backbone.js collections are ordered sets of models, providing the glue between your existing API over a RESTful JSON interface, and your interface. The views in Backbone.js are tied to a DOM element and render the HTML for the model data associated with it. This makes it straightforward to handle complex UI elements. The events module facilitates binding and triggering custom events. Models, collections, and views in Backbone.js extend from Events, providing them with event triggering capabilities. Backbone.js also provides a rich API of enumerable functions, underscore.js methods like forEach, map, reduce, filter, and more are directly applied on Models and Collections. From a development perspective, Backbone.js is lightweight and only depends on two JavaScript libraries, Underscore.js and jQuery. This makes it a great choice for projects where you don't want a heavy framework. Backbone.js offers a flexible way of separating concerns in your application. By separating data into models, business logic into collections and views for handling the user interface, Backbone.js provides a structure that makes code easier to manage. Backbone.js also has a vibrant community and a large number of plugins available to extend its functionality. Its well-documented API and a large number of tutorials make it accessible for beginners and experienced developers alike. From a performance perspective, Backbone.js is fast. As a lightweight library, it doesn't slow down your application. It's well-suited to applications where performance is critical. In conclusion, Backbone.js is a powerful, lightweight, and flexible JavaScript library that provides structure to your web applications. It offers an MVC-like structure, a rich API, and a vibrant community, making it an excellent choice for structuring your JavaScript code.