With its advantages in fast download speeds and small file sizes, the Flash plug-in for website multimedia has quickly become one of the most popular and ubiquitous plug-ins on the internet. Flash is installed on 97% of all computers that use the internet. Dynamic Digital Advertising designers are highly skilled in creating custom website designs that integrate this software, as well as its close sister Shockwave. Flash can be used for animations, simple graphics or navigation and can enhance an HTML-based website. Flash does require a downloaded plug-in from Macromedia, but most of the newer browsers come with this functionality pre-installed.