The main benefit of using Ajax in website is that it can communicate with server and retrieve data asynchronously without disturbing the loading of pages or current behavior of the page. That very well means that it will speed up the loading of pages. Everywhere, you will find that Ajax has its presence, including Google, Yahoo, Amazon! So it is certain that Ajax will continue to have its presence for a significant amount of time in the future.
Hence, it now comes as logical need for every good web design company to use Ajax to make the website more users friendly and responsive and better in functionality. You can be very sure that when you hire any freelance web designer he will certainly make good use of AJAX to demonstrate and justify his freelancing skills.