Ajax is not a technology but group of technologies, It is an important front-end web technologies that lets JavaScript communicate with a web server. A new content can be loaded without leaving a current page creating a better and faster experience for the website visitor. It is a client-side script that communicates to and from a server database without the need for a complete page refresh or a post back. It is a method of exchanging data with a server and updating part of a web page without reloading the entire page. Ajax development gives user a delightful experience of browsing.