By allowing more sophisticated functionality using easier-to-implement web standards, Ajax is proving a real alternative for creating powerful web applications. These applications look and act very similar to traditional desktop applications without relying on plug-ins or browser-specific features.
Some uses for AJAX technology are as follows:
Refreshing Data: Web pages often have data from a server for up-to-date details such as scores, stock quotes, weather, or application-specific data. A client may use AJAX Web Based Application techniques to get a set of current data without reloading a full page.
Form Data Validation: User IDs, serial numbers, postal codes, or even special coupon codes and other such data that has to be filled in forms require server-side validation. This can be validated even before the user submits the form.
Auto-filling: Data such as an email address, name, or city name can be automatically filled in a form.
Load on Demand: Based on a client event, an HTML page can fetch more data in the background, allowing the browser to load pages more quickly.
User interface controls and effects: Certain controls like menus, data tables, rich text editors, calendars allow better user interaction and interaction with HTML pages, generally without requiring the user to reload the page.
The importance and use of AJAX Technology, therefore, is quite clear. It has paced up things making them user friendly and easy.