Website script holds large importance as far as popularity and usage convenience are concerned. As an innovative web language AJAX may not be very popular as it has come quite recently as compared with other web languages which have been around for last 10 years or more. For beginners a quick feedback of AJAX can be helpful.
AJAX is really faster in its application as it does not need connection to server every time you ask for the information. Call back process for required information from users is capable enough to avoid sluggishness of page view. Data updation has been made quite simple and there is no need to review the entire contents. The system can select the bits to update. AJAX uses those scripts which are normally supported by all major browsers.
If you are planning to develop a new website, you can try AJAX. Online tutorials are available to get basic start up guidelines also.