The traditional way of passing and retrieving data from page to page requires you to click submit buttons to pass all form fields and process it. After submitting, the user will have to wait for the server’s reply and be redirected to the action page where the results are provided. With this type of traditional architecture of processing data would require much time and would result for unproductive work paradigm.

With the use of AJAX, while preparing the data to be processed, a parallel request operation is done through the javascript XMLHttpRequest object.  So, the page would request and at the same time response from the web server without reloading the page. The user will just stay on the same page and the background scripts will do the processing of sending and re retrieving request results from the server .