* jQuery is great library for developing ajax based application.
    * It helps the programmers to keep code simple and concise and reusable.
    * jQuery library simplifies the process of traversal of HTML DOM tree.
    * jQuery can also handle events, perform animation, and add the Ajax support in web applications.

    Because in javascript we have to write functions with core & oops concepts, but in jquery we do't need to write more   functions we just need only use those are already write in jquery library.