Ajax (short form for "Asynchronous JavaScript and XML") is a set of web development techniques that uses various web technologies on the client-side to create asynchronous web applications. With Ajax, web applications can send and retrieve data from a server asynchronously (in the background) without interfering with the display and behaviour of the existing page. By decoupling the data interchange layer from the presentation layer, Ajax allows web pages and, by extension, web applications, to change content dynamically without the need to reload the entire page. In practice, modern implementations commonly utilize JSON instead of XML. This course mainly focuses on learning AJAXwhich is an acronym for "Asynchronous Javascript XML". it isvery important in web development field like social networking websites where a part of webpage has tobe updated without reloading the whole page.In this tutorial series you get to learn about it's basics . AJAX is in very demand.it is easy to learn and it is used in most web development today. By enrolling in this course you will learn all basics in less than one hour you will get a very good grip on topics in AJAX. By the end of it you will have a firm understanding of the concepts of AJAXand you will be able to code AJAX in web applications on your own