Adobe Flash Player is a proprietary (closed source) and freeware web browser plugin designed to allow users to enjoy rich multimedia and Internet applications powered by the Flash technology.
Adoe Flash Player is an essential tool for any operating system, to allow it to run Flash animations and applications.
This includes games, animated websites or even the videos we watch on YouTube.
Adobe Flash Player allows us to view videos in FLV format using our web browser, this format is used by YouTube, Dailymotion and all other video stream services we can find nowadays on the web.
Also, plenty of web applications use Flash elements to show the user a more simple and easier-to-use interface.