What is AJAX (Asynchronous JavaScript and XML) - A web site development tool used to create applications that are interactive.

AJAX (Asynchronous JavaScript and XML) - A web site development tool used to create applications that are interactive. The purpose of the AJAX technology is to move much of the computation to the user's computer so that web pages do not have to reload completely when an interactive application is used. This means that speed and interactivity are increased. Search engine marketers should take care, however. Unless administered judiciously, AJAX can cause problems in any search engine optimization for sites that use the technology.