Professional Flash website design not only holds the attention of your audience for longer, but also enhances the website’s usability and intuitiveness when used judiciously. In fact, you can bet for better memory retention among your target audience groups with a professional Flash web site design. Nevertheless, when going for professional flash design, some factors must be considered. 

1. A hurriedly done Flash design in all probability will not yield professional flash web design. So, you must make full use of Flash tutorials online and join relevant forums to learn Flash designing with all its niceties. 
2. Cross-platform compatibility must be ensured for satisfactory user browsing experience. Any changes in screen resolution or changes in web browser must not upset the desirable output.
3. Ensure a fast to load website with small file sizes, medium frame rates, keeping the code clear from unnecessary repeat code and using SSI (Server Side Include) files.