JavaScript is a popular client-side scripting language. AJAX is a web development technique that combines Asynchronous JavaScript and XML. Along with HTML and CSS, it is considered a standard of web development that few professionals in the industry can do without.

AJAX enables web developers to create better, faster and more interactive web pages and applications. Basically it makes possible for the Javascript to communicate directly with the server, so specific data can be exchanged without reloading the page.