It is used to produce interactive animations that are especially well suited for use on the Web. Flash uses vector graphics, which are far more compact than the bitmap images often used on the Web. Vector graphics also have the advantage of scaling to any size with no loss of clarity. Short sounds are easily built into Flash to create a true multimedia experience. Flash can store elements as symbols and re-use them to conserve file space.
Flash allows user interactivity.
For example, complex events and animations can be triggered by clicking or mousing over a graphic. Users can steer their way among scenes, play games, and take exams. Flash movies begin displaying while download is still in progress. All these features make Flash the tool of choice for fast, colorful, interactive Web sites. This is free and easy to install via the Web.