Flash is used to provide sophisticated animation and graphical movement to a website. It can also be used to play video and music. With the use of Actionscript programming in Flash, rich interactive user-interfaces can be created.

Like Javascript, Flash content is executed on the user's client machines as opposed to on the server. Flash content is executed by the Flash Player which is a component installed into the user's browser.

A strong point with Flash is its superb animation capabilities. Animation can be implemented via frame-by-frame animation, or by tweening on the timeline, or by using Actionscript's Tween's class.

Actionscript is a full-featured programming language with programming constructs such as objects, branches, and loops.