What is Ajax? This tutorial introduces you to the basic concepts of the language. It is a group of techniques which are implemented on the client side for creating asynchronous, fast and dynamic web content. The acronym AJAX means Asynchronous JavaScript and XML. It is a web browser technology independent of web server software. AJAX allows sending and retrieving of data from a server asynchronously at the back end without disturbing the display. This technique, therefore, negates the need of reloading a web page, where classic web pages have to be reloaded if their content changes at the back end.