A Flash animation or Flash cartoon is an animated film which is created using Adobe Flash animation software and often distributed in the .swf file format. It can be created in Flash or with other programs capable of writing .swf files. With dozens of Flash animated television series, countless more Flash animated television commercials, and award-winning online shorts in circulation, Flash animation is enjoying much popularity. In terms of Flash animation on websites, most search engines cannot read the files and will simply jump past them when crawling your website. In addition, if not properly built Flash files can easily become large and slow to load on a site.