Asynchronous JavaScript and XML, in short AJAX is a web development technology used to create interactive web applications that dynamically display and interact with the information presented.
The most significant peculiarity of Ajax is the increased responsiveness and interactivity of web pages achieved by exchanging small amounts of data with the server "behind the scenes" so that entire web pages do not have to be reloaded each time there is a need to get data from the server. This is intended to increase the web page's interactivity, speed, functionality and usability.