Less server interaction − You can validate user input before sending the page off to the server. This saves server traffic, which means less load on your server.
Immediate feedback to the visitors − They don’t have to wait for a page reload to see if they have forgotten to enter something.
Increased interactivity − Creating Interfaces with the user which when hovered by mouse activates.
Richer interfaces −Sliders and Drag-and-drop components are usable to provide users with a Rich Interface.